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Research Article

Monetary value of disability-adjusted life years lost from all causes in Mauritius in 2019

[version 1; peer review: peer review discontinued]
PUBLISHED 03 Feb 2021
Author details Author details
OPEN PEER REVIEW
PEER REVIEW DISCONTINUED

This article is included in the TDR gateway.

Abstract

Background: The Republic of Mauritius had a total of 422,567 disability-adjusted life years (DALYs) from all causes in 2019. This study aimed to estimate the monetary value of DALYs lost in 2019 from all causes in Mauritius and those projected to be lost in 2030; and to estimate the monetary value of DALYs savings in 2030 if Mauritius were to attain the national targets related to five targets of the United Nations Sustainable Development Goal 3 on good health and well-being.
Methods: The human capital approach was used to monetarily value DALYs lost from 157 causes in 2019. The monetary value of DALYs lost in 2019 from each cause was calculated from the product of net gross domestic product (GDP) per capita in Mauritius and the number of DALYs lost from a specific cause. The percentage reductions implied in the SDG3 targets were used to project the monetary values of DALYs expected in 2030. The potential savings equal the monetary value of DALYs lost in 2019 less the monetary value of DALYs expected in 2030.
Results:  The DALYs lost in 2019 had a total monetary value of Int$ 9.46 billion and a mean value of Int$ 22,389 per DALY. Of this amount, 84.2% resulted from non-communicable diseases; 8.7% from communicable, maternal, neonatal, and nutritional diseases; and 7.1% from injuries. Full attainment of national targets related to the five SDG3 targets would avert DALYs losses to the value of Int$ 2.4 billion.
Conclusions: Diseases and injuries cause a significant annual DALYs loss with substantive monetary value. Fully achieving the five SDG3 targets could save Mauritius nearly 8% of its total GDP in 2019. To achieve such savings, Mauritius needs to strengthen further the national health system, other systems that tackle the social determinants of health, and the national health research system.

Keywords

Mauritius, disability-adjusted life year, monetary value, sustainable development goal

Introduction

The Republic of Mauritius is one of 16 Southern African Development Community (SADC) member states1. It had an estimated population of 1.279 million people; gross domestic product (GDP) of International dollars (Int$) 30.171 billion; and GDP per capita of Int$ 23,818.571 in 20192. In 2017, the country had a high human development index (HDI) of 0.79, and the income inequality Gini coefficient was 35.83.

Mauritius lost a total of 422,566.58 disability-adjusted life years (DALYs) from all causes in 20194 compared to 132,813 DALYs in 19935. Of the 2019 DALYs, 355,910.13 (84.2%) were from non-communicable diseases (NCDs); 36,780.42 (8.7%) from communicable, maternal, neonatal, and nutritional diseases (CMNNDs); and 29,876.03 (7.1%) from injuries (INJ). Figure 1 portrays the DALYs from all causes by 23 age groups. People aged between 15 and 59 years bore 49.55% of the DALYs4.

f20a3e5d-262d-4a80-b4d9-1cd0c8148d9e_figure1.gif

Figure 1. Disability-adjusted life years (DALYs) from all causes by age groups in Mauritius in 2019.

Figure 2 depicts the share of DALYs by 22 disease categories in 2019. About 26.7% of the NCD DALYs resulted from diabetes and kidney diseases; 20.7% from cardiovascular diseases; 11% from neoplasms; 8.4% from musculoskeletal disorders; 6.3% from mental disorders; 5.7% from neurological disorders; 4.2% from chronic respiratory diseases; 3.9% from sense organ disease; 3.8% from digestive diseases; 2.2% from skin and subcutaneous diseases; 1.9% from substance use disorders; and 5.2% from other NCDs4. Nearly 47.4% of the NCD-related DALYs were attributed to diabetes and kidney diseases, and cardiovascular diseases.

f20a3e5d-262d-4a80-b4d9-1cd0c8148d9e_figure2.gif

Figure 2. The DALYs in Mauritius by disease categories in 2019.

Approximately 31.2% of the CMNND DALYs lost was caused by maternal and neonatal disorders; 20.6% by respiratory infections and tuberculosis (TB); 13.7% by neglected tropical diseases (NTDs); 12.8% by HIV/AIDS and sexually transmitted infections; 10% by nutritional deficiencies; 6.9% by enteric infections; and 3.8% by other infectious diseases4. Maternal and neonatal disorders, respiratory infections, and TB caused 52.8% of the CMNND DALYs.

Of the 29,876 DALYs from INJ, 33.8% were attributed to transport injuries; 39.9% to unintentional injuries; and 26.3% to self-harm and interpersonal violence4.

On 25 September 2015, the United Nations General Assembly (UNGA) adopted resolution A/RES/70/1, titled Transforming our World: The 2030 Agenda for Sustainable Development6, which contains 17 Sustainable Development Goals (SDGs) and 169 targets. The SDG3 on ensuring healthy lives and promoting wellbeing for all at all ages has 13 targets. The following five of these SDG3 targets are intended for reducing the abovementioned disease burden6:

  • ‘Target 3.1: By 2030, reduce the global maternal mortality ratio to less than 70 per 100,000 live births.

  • Target 3.2: By 2030, end preventable deaths of newborns and children under 5 years of age, with all countries aiming to reduce neonatal mortality to at least as low as 12 per 1,000 live births and under-5 mortality to at least as low as 25 per 1,000 live births.

  • Target 3.3: By 2030, end the epidemics of AIDS, tuberculosis, malaria and neglected tropical diseases and combat hepatitis, water-borne diseases and other communicable diseases.

  • Target 3.4: By 2030, reduce by one-third premature mortality from non-communicable diseases through prevention and treatment and promote mental health and wellbeing.

  • Target 3.6: By 2020, halve the number of global deaths and injuries from road traffic accidents’ (p.14).

The current health expenditure per capita (CHEPC) in Mauritius was US$ 600 in 20177. It consisted of the domestic general government health expenditure of US$ 257 per capita; domestic private health expenditure of US$ 338 per capita (of which US$ 293 was from out-of-pocket spending); and external health expenditure of US$ 5 per capita. The Mauritius CHEPC was within the range of US$ 297 (minimum) and US$ 984 (maximum) per year of health systems investment recommended for attaining SDG3 among upper-middle-income economies8. The fact that out-of-pocket payments (OOPS) constitute 49% of CHEPC is a matter of concern because, according to the World Health Organization (WHO)9, when OOPS exceed 20% of total health expenditure, the incidence of financial catastrophe and impoverishment increases. Between 2012 and 2018, the population with households with health expenditures exceeding 25% of total household expenditure (or income) grew slightly from 1.79% to 1.8%10,11.

The Mauritius domestic general government health expenditure is 10% of general government expenditure, which is below the African Heads of State and Government 2001 target of allocating at least 15% of the national budget to health development12. Furthermore, in 2017, the Mauritius CHEPC of US$ 600 (2% of GDP) was about seven-fold lower than the average of US$ 4,003 (9% of average GDP per capita) for Organisation for Economic Co-operation and Development countries13. As a result, Mauritius has a universal health service coverage index (UHSCI) of 63 (on a scale of 0 to the target of 100), denoting a gap in essential health services coverage of 3714. The deficit in the UHSCI was attributed to suboptimal component scores of 69 in reproductive, maternal, newborn, and child health; 53 in infectious diseases; 52 in NCDs; and 80 in service capacity and access14.

Embracing the principles of a welfare state, Mauritius ensures the provision of free healthcare at the point of use in all public facilities. Steady economic growth over the last decade has enabled the national economy to sustain social protection systems, including health10,15. To attain SDG3, Mauritius needs to sustainably increase its investments in the national health system and other systems that address the social determinants of health16. The health sector will have to keep on competing for scarce budgetary allocations with economic sectors. Thus, the health and health-related sectors ought to mount sustained evidence-based advocacy within the government and the private sector to sustain, grow, and efficiently utilize funding for health development to bridge the existing gap in access to essential health services.

People who control the national resources in the public and private sectors are not public health experts17, and thus, they might not fully understand the intricacies around the negative impact of disability and premature mortality (from various causes) on economic indicators, such as GDP. Therefore, health sector stakeholders will have to couch their advocacy messages in a language that those who control national resources can understand17-19.

Evidence from the economic burden of disease studies in both economically developed and developing countries continues to be used to advocate for increased investments in health development20-33. The WHO Regional Office for Africa (WHO/AFRO) report titled A Heavy Burden: The Productivity Cost of Illness in Africa, contains useful aggregated economic evidence for use in advocacy at global and regional forums34. However, it is of limited usefulness to individual countries for two reasons: (a) it is not disaggregated by country and disease; and (b) the analysis is based on 2015 DALYs data. Mauritius policymakers require updated and contextualized economic evidence for use in making a case for increased investment in health development.

The specific objectives of this study are: (a) to estimate the monetary value of DALYs lost from all causes in Mauritius in 2019; (b) to estimate the monetary value of DALYs expected to be lost from all causes in Mauritius in 2030; and (c) to estimate the monetary value of DALYs savings in 2030 if Mauritius were to attain the SDG3 disease and injury-related targets of 3.1, 3.2, 3.3, 3.4, and 3.6.

Methods

The DALYs

The seminal application of DALYs to measure the global burden of disease was in 1993 in the World Bank report titled World Development Report 1993: Investing in Health, which ‘examined the interplay between human health, health policy, and economic development’ (p. iii)35. However, it was only in 1994 that Professor CJL Murray developed and published in the Bulletin of the World Health Organization the conceptual basis for the DALYs36. He defined DALY as the sum of potential years of life lost (PYLL) due to premature death and years lived with disability (YLD).

WHO37 further explains that DALYs for a specific cause are calculated using the following formula:

DALY(c,s,a,t) = PYLL(c,s,a,t) + YLD(c,s,a,t) for a specific disease or injury c, age a, sex s, and year t.

Even though debate has been ranging since 1996 about various real and perceived shortcomings of the DALYs38-41, it has withstood the test of time and continues to be a useful metric in global health discourse42.

In this study, we calculate the monetary value of DALYs lost in Mauritius in 2019 from all 157 causes. The DALYs data are from the Institute for Health Metrics and Evaluation (IHME) global burden of disease (GBD) Study 2019 database4. Methodological details and sources of data used in the GBD study 2019 are from an article published by the GBD 2019 Diseases and Injuries Collaborators43.

Estimating the monetary value of DALYs lost in Mauritius in 2019

This study replicates the human capital approach initially suggested by Weisbrod44, and subsequently, adapted to financially value DALYs in Kenya among the elderly45 and all age groups46, the Arab Maghreb Union (AMU)47, the Central African Economic and Monetary Community (CEMAC)48, the East African Community (EAC)49, Zambia50, and the African region34, to estimate the economic value of DALYs lost in 2019 in Mauritius. The development of health-related human capital begins at birth and ends at death; and thus, diseases have inter-and intra-generational negative impact on the process of human capital creation43.

According to Weisbrod44, ‘The present value of a man at any given age may be defined operationally as his discounted expected future earnings stream net of his consumption …’ (p.427). GDP per capita is sometimes used as an indicator of an individual’s economic contribution per year. Any loss of DALYs erodes GDP through its components of consumption of household goods and services, investment (from savings), government spending (from taxes and service fees), and net exports (i.e. exports minus imports). The WHO51 clarifies that ‘GDP includes expenditure on health goods and services, so this component should be omitted and the focus of analysis be redirected towards establishing the present value of discounted aggregate flows of current and future consumption of non-health-related goods and services linked to disease’ (p.4). As further explained by the WHO51 and Chisholm et al.52, individuals do not derive utility (pleasure or happiness) from consumption of health goods and services, but from consumption of non-health consumption commodities (goods and services), leisure time, and health status. Thus, it has become common practice to use net GDP (i.e. GDP per capita minus health expenditure per person) in the valuation of DALYs34,45-50.

The total monetary value of DALYs lost in Mauritius from 157 causes (TMOVD) is the sum of the monetary value of DALYs lost from each ith disease or injury (MOVDi)45-50, denoted arithmetically as

(1)
TMOVD2019=∑i=1γ=157(MOVD1+MOVD2+MOVD3+…+MOVDγ)

where ∑i=1γ=157 is the summation of monetary values of DALYs lost from the 1st to the 157th cause; MOVD1 is the monetary value of DALYs lost from the 1st disease; MOVD2 is the monetary value of DALYs lost from the 2nd disease; MOVD3 is the monetary value of DALYs lost from the 3rd disease; and MOVDγ is the monetary value of DALYs lost from the γth disease.

The monetary value of DALYs lost from each of the 157 diseases is equal to the number of DALYs lost from each disease (DALYi = 1, . . , γ) multiplied by Mauritius GDP per capita (GDPPC) minus CHEPC45-50, denoted algebraically as

(2)
MOVD1=DALY1×GDPPC-CHEPC
(3)
MOVD2=DALY2×GDPPC-CHEPC
(4)
MOVD3=DALY3×GDPPC-CHEPC
(5)
MOVDk=DALYγ×GDPPC-CHEPC

where DALY1 is the number of DALYs lost from the 1st disease, DALY2 is the number of DALYs lost from the 2nd disease, DALY3 is the number of DALYs lost from the 3rd disease, and DALYγ is the number of DALYs lost from the γth disease. The DALYs acquired from the IHME GBD Study 2019 database are already discounted at 3%43.

Estimating expected monetary value of DALYs lost in 2030

In this subsection, we adapt the formulae used in past studies in Africa34,45-50 to estimate the monetary value of DALYs losses in 2030, assuming the five disease-related SDG3 targets in Table 1 are fully accomplished in Mauritius53-59.

Table 1. Health SDG3 targets and expected percentage reductions for Mauritius.

TargetDescriptionPercentage reduction envisaged between 2020 and 2030
SDG 3.1By 2030, reduce the global maternal mortality ratio (MMR) to less than 70 per 100,000 live births6. Mauritius in 2019 had an MMR of 62 per 100,000 live births, that is, SDG 3.1 was exceeded53. The country set an MMR target of 35 per 100,000 live births by 202453. The change between 2020 and 2024 equals [((62 - 35)/62) = 0.435483870967742]. Assuming that the rate of decrease remains constant between 2025 and 2030, the MMR in 2030 equals 19.75806452 per 1,000 live births, that is, [35 × (35 × 0.435483870967742)]. Thus, the target reduction for Mauritius between 2020 and 2030 equals 68.13215401%, that is [=((62 - 19.758064516129)/62)]. The average annual rate of reduction (AARR) formula is from UNICEF54. The Mauritius AARR between 2019 and 2030 equals 9.87396890591872, that is, (((19.758064516129/62)^(1/11)-1)*100)*(-1).68.13%
(AARR = 9.87396890591872%)
SDG 3.2By 2030, end preventable deaths of newborns, with all countries aiming to reduce neonatal mortality to at least as low as 12 per 1,000 live births6. In 2019, the neonatal mortality rate for Mauritius was 10.3 per 1,000 live births53. WHO/AFRO projected Mauritius to have a neonatal mortality of 6 per 1,000 live births by 203055. Thus, the target reduction between 2020 and 2030 equals 41.75%, that is [((10.3-6)/10.3)*100]. AARR = (((6/10.3)^(1/11)-1)*100)*(-1)= 4.79387013350859%.41.75%
(AARR = 4.79387013350859%)
SDG 3.3By 2030, end the epidemics of AIDS, TB, malaria, and NTDs and reduce hepatitis, water-borne diseases, and other communicable diseases6.
(a) Reduce global HIV-related deaths from 1,062,352 in 2015 to below 500,000 by 202056, implying a rate of reduction of 52.9346205400846%, that is, [=(1062352 - 500000)/1062352]. In 2019, there were 91.38 HIV deaths in Mauritius4. Assuming that the rate of reduction remains constant, the HIV deaths in 2030 for Mauritius equal 43.0083437504707, that is, =(91.38 - (91.38*0.529346205400846)). AARR =
= (((43.0083437504707/91.38)^(1/10)-1)*100)*(-1)
= 7.25934551582492%.
52.93%
(AARR= 7.25934551582492%)
(b) The number of TB deaths will be reduced by 90% from 2015 to 203057, meaning a reduction rate of 0.06% per year, that is, 0.9/15 years. In 2019, there were 14.689 TB deaths in Mauritius4, projected to decrease to 4.99426 by 2030, that is, 14.689 - ((14.689*(0.06*11 years))). AARR=9.34178282078786%, that is, (((4.99426/14.689)^(1/11)-1)*100)*(-1).66%
(AARR= 9.341782821%)
(c) Mortality due to vector-borne diseases will be reduced globally by at least 75% from 2016 to 203058, meaning a reduction rate of 5% per year, that is 0.75/15 years. In 2019, there were 5048.08 TB-related DALYs in Mauritius4; projected to be 2271.636 DALYs in 2030, that is, (5048.08 - (5048.08*(0.05*11 years))). AARR=7.00194515949536, that is, (((2271.636/5048.08)^(1/11)-1)*100)*(-1)55%
(AARR = 7.00194515949536%)
(d) Globally reduce viral hepatitis B and C deaths from 1.4 million deaths in 2015 reduced to less than 500,000 by 203059, meaning a rate of reduction of 64.28571429, that is, [(1400000 - 500000)/1400000]. Thus, the annual rate of reduction between 2016 and 2030 equals 4.28571428571429, that is, 64.28571429%/15 years. In 2019, there were 91.69 hepatitis deaths in Mauritius4, meaning between 2016 and 2019, deaths reduced by 17.1428571428571, that is, 4.28571428571429% x 4 years. Thus, the reduction between 2020 and 2030 equals 47.14285714, that is, 64.28571429% - 17.1428571428571%. The hepatitis deaths in 2030 equal 48.4647142857143, that is, (91.69 - (91.69*0.471428571428571)). AARR = 5.63137924952368, that is, (((48.4647142857143/91.69)^(1/11)-1)*100)*(-1).47.14%
(AARR = 5.63137924952368%)
SDG 3.4By 2030, reduce premature mortality due to NCDs by one-third through prevention and treatment and promote mental health and well-being6, meaning a reduction rate of 2.22211323900836% per year, that is, 33.3316985851254/15. In 2019, there were 355910.13 NCD-related DALYs in Mauritius4; which were projected to reduce to 268914.142705279 DALYs by 2030, that is, 355910.13 - (355910.13*0.24443245629092). AARR=(((268914.142705279/355910.13)^(1/11)-1)*100)*(-1)24.44%
(AARR = 2.51586648621783%)
SDG 3.6By 2020, halve the number of global deaths and injuries from road traffic accidents6, meaning a rate of reduction of 10% per year, that is, 50%/5 years. In 2019, there were 9585.76 DALYs from transport injuries4. Assuming that Mauritius maintains momentum of 9.082% reduction per year between 2020 and 2030 (i.e. 11 years), transport injuries would lead to 9.58576000000176 DALYs by 2030, that is, 9585.76 - (9585.76 *0.999). AARR = (((9.58576/9585.76)^(1/11)-1)*100)*(-1).99.9%
(AARR = 46.6330076879369%

The reductions in the monetary value of DALYs lost from maternal disorders (SDG3 target 3.1), neonatal disorders (SDG3 target 3.2), HIV/AIDS (SDG 3 target 3.3a), TB (SDG3 target 3.3b), NTDs (SDG3 target 3.3c), viral hepatitis (SDG3 target 3.3d), NCD (SDG3 target 3.4), and transport injury (SDG3 target 3.6) are estimated using the form of equations below. For example, the equation used in estimating the SDG3 target 3.1 envisages a reduction in the monetary value of DALYs from maternal disorders (MD) as follows:

(6)
MOVDMD2030=MOVDMD2019-MOVDMD2019×MMR2019-MMRT3.1MMR2019

where: MOVDMD2030 is the projected monetary value of DALYs lost from MD in 2030; MOVDMD2019 is the monetary value of DALYs lost from MD in 2019; MMR2019 is the maternal mortality ratio in 2019; and MMRT3.1 is the projected maternal mortality ratio in 2030 supposing target 3.1 is fully realized. Since, MOVDMD2019 = Int$ 9,782,174; MMR2019 = 62 per 100,000 live births; and MMRT3.1 = 19.75806452, the MOVDMD2030 is estimated as follows:

MOVDMD2030=Int$9,782,174-Int$9,782,174×62-19.7580645262=Int$3,117,368.

Calculate the potential monetary savings from DALYs lost averted

By subtracting the monetary value of DALYs lost in 2019 from the monetary value of DALYs lost in 2030 from the ith disease (or injury), we obtain the potential savings in the monetary value of DALYs, assuming that the ith SDG3 disease (or injury) target is fully accomplished45-50. For example, the projected savings in the monetary value of DALYs lost from NTDs is estimated as follows:

(7)
MOVDNTDs SAVING=MOVDNTDs2019-MOVDNTDs2030
MOVDNTDs SAVING=Int$113,021,138-Int$50,859,512=Int$62,161,626.

where MOVDNTDs SAVING is the probable saving in the monetary value of DALYs lost to NTDs by 2030; MOVDNTDs2019 is the monetary value of DALYs lost to NTDs in 2019; and MOVDNTDs2030 is the monetary value of DALYs anticipated to be lost from NTDs in 2030.

Data sources

The DALYs data for the 157 causes are from the IHME GBD study 2019 database4; the CHEPC data are from the WHO Global Health Expenditure Database7; and the 2019 per capita GDP data are from the IMF World Economic Outlook database2. A summary of the data analysed can be found in the Extended data60.

Data analysis

The analysis is conducted using Excel Software developed by Microsoft (New York)61. It is undertaken in seven steps.

Step 1: Construct economic model on Excel software

The economic model containing the equations is developed on an Excel spreadsheet.

Step 2: Collate DALYs data

The 2019 data on DALYs lost from 157 causes are extracted from the IHME GBD4 and saved in an Excel spreadsheet. The data are then sorted by the three broad categories of health conditions (i.e. NCDs, CMNND, and INJ). Then, the 157 causes are organized under the relevant broad category.

Step 3: Collate health expenditure data

The Mauritius 2017 CHEPC of Int$ 1,278.01147461 was from the WHO Global Health Expenditure Database7. The latest expenditure data available are for 2017, and thus, it is necessary to project the CHEPC for 2019 (the baseline year of the analysis) in three sub-steps:

  • a) Calculate CHEPC growth rate between 2016 and 2017 = ((CHEPC2017 - CHEPC2016)/CHEPC2016) = ((Int$ 1,278.01147461 - Int$ 1208.34094238)/Int$ 1208.34094238) = 0.0576580084200196.

  • b) Projection of CHEPC2018 = ((CHEPC2017 + (CHEPC2017 × 0.0576580084200196) = ((Int$ 1,278.01147461 + (Int$ 1,278.01147461 × 0.0576580084200196)) = Int$ 1351.69907097395.

  • c) Projection of CHEPC2019 = ((CHEPC2018 + (CHEPC2018 × 0.0576580084200196) = ((Int$ 1351.69907097395 + (Int$ 1351.69907097395 × 0.0576580084200196))) = Int$ 1429.63534738949.

Step 3: Collate per capita GDP data

The Mauritius GDP per capita (GDPPC) of Int$ 23,818.571 in 2019 is from the IMF World Economic Outlook Database2.

Step 4: Calculate non-health per capita GDP

Non-health GDP per capita is estimated as the difference between GDP per capita and CHEPC. The non-health per capita GDP (NHGDPPC) = GDPPC - CHEPC = Int$ 23,818.571 - Int$ 1,429.63534738949 = Int$ 22,388.9356526105.

Step 5: Estimate 2019 monetary value of DALYs lost from each cause

The monetary value of DALYs lost from a specific cause i equals the number of DALYs lost multiplied by non-health per capita GDP61. For example, the monetary value of DALYs from neonatal disorders (MOVDND) is estimated as follows:

MOVDND=DALYND×NHGDPPC=11,044.07×22,388.9356526105=247,264,973.

Step 6: Project 2030 potential monetary value of DALYs lost from SDG3-related causes

We use an example of neonatal disorders to illustrate how the 2030 monetary value of DALYs lost from each of the SDG3 causes is projected:

MOVDND2030=MOVDND2019-MOVDND2019×ND2019-NDT3.2ND2019
MOVDND2030=247,264,973-247,264,973×10.3-610.3=Int$144,037,848.

All the abbreviations are as defined earlier.

Step 7: Estimate the savings in the monetary value of DALYs

We obtain the potential savings in the monetary value of DALYs lost prevented, assuming that the ith SDG3 (or national) disease target is fully realized, by subtracting the monetary value of DALYs lost in 2019 from the monetary value of DALYs projected to be lost in 2030 from the ith disease. We demonstrate, using target SDG 3.2 on neonatal disorders, how savings for all the SDG3-related causes are estimated:

MOVDND_SAVING=MOVDND2019×MOVDND2030=247,264,973-144,037,848=Int$103,227,124.

Results

The monetary value of the DALYs lost in Mauritius in 2019

All causes:

In 2019, Mauritius lost a total of 422,566.58 DALYs from all causes4 valued at Int$ 9,460,815,967, and with a mean value of Int$ 22,389 per DALY. About 84.2% resulted from NCD, 8.7% from CMNND, and 7.1% to INJ.

Figure 3 portrays the monetary value of DALYs accruing to all causes by age. People aged 14 years and lower sustained DALYs with a value of Int$ 575,675,182 (6.1%); 15-59-year-olds bore DALYs valued at Int$ 4,687,590,169 (49.5%); and those aged 60 years and above incurred DALYs valued at Int$ 4,197,550,617 (44.4%).

f20a3e5d-262d-4a80-b4d9-1cd0c8148d9e_figure3.gif

Figure 3. Monetary value of DALYs from all causes by age group in Mauritius (Int$ 2019).

Communicable, maternal, neonatal, and nutritional diseases

Figure 4 presents the monetary value of DALYs from CMNND. Out of the total monetary value of DALYs from CMNND of Int$ 823.47 million, 31.2% ensued from maternal and neonatal disorders; 21.6% from respiratory infections and TB; 13.7% from NTDs; 12.8% from HIV/AIDS and sexually transmitted infections; 10% from nutritional deficiencies; 6.9% from enteric infections; and 3.8% from other infectious diseases. About Int$ 642 million (78%) accrued to DALYs from neonatal disorders, lower respiratory infections, HIV/AIDS, schistosomiasis, and dietary iron deficiency. The detailed monetary value of DALYs per CMNND health condition is contained in the Extended data62.

f20a3e5d-262d-4a80-b4d9-1cd0c8148d9e_figure4.gif

Figure 4. Monetary value of DALYs from communicable, maternal, neonatal, and nutritional diseases in Mauritius (Int$ 2019).

Non-communicable diseases

Figure 5 shows the monetary value of the DALYs associated with NCDs. As alluded to in the first subsection, the NCDs combined caused a loss of 355,910.13 DALYs, with a total monetary value of about Int$ 7.968 billion. Approximately, 26.7% of that monetary value was attributed to diabetes and kidney diseases; 20.7% to cardiovascular diseases; 11% to neoplasms/cancers; 8.5% to musculoskeletal disorders; 6.3% to mental disorders; 5.7% to neurological disorders; 4.1% to chronic respiratory diseases; 3.9% to sense organ diseases; 3.8% to digestive diseases; 2.2% to skin and subcutaneous diseases; 1.9% to substance use disorders; and 5.2% to other NCDs. Therefore, 58.4% of the total monetary value of DALYs from NCDs was attributed to diabetes and kidney diseases, cardiovascular diseases, and neoplasms (cancers). The monetary value of DALYs by each NCD is available in the Extended data63.

f20a3e5d-262d-4a80-b4d9-1cd0c8148d9e_figure5.gif

Figure 5. Monetary value of DALYs from non-communicable diseases in Mauritius (Int$ 2019).

Injuries

Figure 6 depicts the monetary value of DALYs from various forms of injuries in Mauritius. The 29,876 DALYs from injuries had a total monetary value of Int$ 668.9 million. Out of the latter estimate, Int$ 225.9 million (33.8%) accrued to transport injuries; Int$ 266.7 million (39.9%) to unintentional injuries; and Int$ 176.3 million (26.3%) to self-harm and interpersonal violence. About Int$ 531.3 million (79.4%) of the total monetary value of DALYs associated with injuries emanated from road injuries (32.1%), self-harm (19.1%), falls (15.3%), interpersonal violence (7.2%), and drowning (5.7%). The monetary value of DALYs by each type of injury can be found in the Extended data64.

f20a3e5d-262d-4a80-b4d9-1cd0c8148d9e_figure6.gif

Figure 6. Monetary value of DALYs lost from injuries in Mauritius (Int$ 2019).

The monetary value of DALYs in 2019 from five SDG3 related targets

Table 2 shows that the five SDG3-related health conditions analysed in this study resulted in 387,235 DALYs in 2019 with a value of Int$ 8.67 billion, which is 91.6% of the national total monetary value from all causes. About 97.24% of the monetary value of SDG3-related DALYs was attributed to NCDs, neonatal disorders, and transport injuries.

Table 2. Monetary value of DALYs in 2019 from five SDG3-related targets in Mauritius (2019 Int$).

SDG3 TargetsDALYs in 2019Monetary value of DALYs (Int$)Percent
SDG3.1: Maternal disorders4379,782,1740.11
SDG3.2: Neonatal disorders11,044247,264,9732.85
SDG3.3a: HIV/AIDS4,510100,971,4131.16
SDG3.3b: Malaria--0.00
SDG3.3c: TB60913,625,9060.16
SDG3.3d: Neglected tropical diseases5,048113,021,1381.30
SDG3.3e: Acute hepatitis922,052,8420.02
SDG3.4: NCDs355,9107,968,448,99991.91
SDG3.6: Transport injuries9,586214,614,9642.48
Total for SDG3 health conditions387,2358,669,782,408100.00
National all causes total422,5679,460,815,969

Estimates of reductions in the monetary value of DALYs in Mauritius between 2020 and 2030 assuming the five SDG3-related targets are attained

Table 3 shows the monetary value of DALYs in 2019, the monetary value of DALYs lost in 2030, and the potential savings from DALY losses prevented assuming that the five disease-related SDG3 targets analysed in this study are attained.

Table 3. Monetary value of DALYs by SDG3 health conditions in Mauritius (2019 Int$).

Health conditions/diseases(A). Monetary value of DALYs in 2019(B). Monetary value of DALYs in 2030 (Int$)(C). Reduction in monetary value of DALYs by 2030 (Int$) [C=(A-B)]
SDG3.1: Maternal disorders9,782,1743,117,3686,664,806
SDG3.2: Neonatal disorders247,264,973144,037,848103,227,124
SDG3.3a: TB13,625,9064,632,8088,993,098
SDG3.3b: HIV/AIDS100,971,41347,522,57953,448,834
SDG3.3c: Malaria---
SDG3.3d: Acute hepatitis2,052,8421,085,073967,768
SDG3.3e: Neglected tropical diseases (NTDs)113,021,13850,859,51262,161,626
(a). Schistosomiasis99,720,31944,874,14454,846,176
(b). Cysticercosis5,255,1312,364,8092,890,322
(c). Cystic echinococcosis29,10613,09816,008
(d). Dengue3,377,3711,519,8171,857,554
(e). Rabies1,791806985
(f). Intestinal nematode infections527,707237,468290,239
(g). Leprosy15,6727,0538,620
(h). Other NTDs4,094,0411,842,3182,251,722
SDG3.4: Noncommunicable diseases (NCDs)7,968,448,9996,020,701,4371,947,747,562
(a). Neoplasms877,208,126662,789,989214,418,137
(b). Cardiovascular diseases1,646,611,2881,244,126,046402,485,242
(c). Chronic respiratory diseases332,103,590250,926,69481,176,896
(d). Digestive diseases302,965,062228,910,56874,054,494
(e). Neurological disorders453,328,259342,520,119110,808,140
(f). Mental disorders498,531,520376,674,236121,857,284
(g). Substance use disorders152,027,142114,866,77437,160,368
(h). Diabetes and kidney diseases2,128,328,0451,608,095,593520,232,452
(i). Skin and subcutaneous diseases178,323,171134,735,20043,587,971
(j). Sense organ diseases309,495,915233,845,06875,650,847
(k). Musculoskeletal disorders674,076,000509,309,947164,766,052
(l). Other NCDs415,450,881313,901,202101,549,679
SDG3.6: Road injuries214,614,964214,615214,400,349
TOTAL (Int$)8,669,782,4086,272,171,2412,397,611,167

The DALYs lost from the five SDG3 health conditions (MDs, neonatal disorders, TB, HIV/AIDS, acute hepatitis, NTD, NCD and injuries) in 2019 were valued at Int$ 8.67 billion. Assuming that the five SDG3 targets (3.1, 3.2, 3.3, 3.4, and 3.6) are fully achieved by 2030, there would still be DALYs losses of Int$ 6.27 billion. Therefore, the reduction/savings in the monetary value of DALYs lost by 2030 would be Int$ 2.4 billion.

Discussion

Key findings and comparison with similar studies

In 2019, Mauritius lost a total of 402,565 DALYs from all causes with a total monetary value of Int$ 9.46 billion. About 84.2% of the latter was attributed to NCDs, 8.7% to CMNNDs, and 7.1% to INJ. By comparison, 67.3%, 21.9%, and 10.8% of the total monetary value of DALYs lost in the AMU emanated from NCDs, CMNNDs, and INJ, respectively47. Approximately 61.3%, 28.4%, and 10.3% of the total monetary value of DALYs lost in the CEMAC was due to CMNNDs, NCDs, and INJ, respectively48. In the EAC, approximately 58.2%, 30.3%, and 11.5% of the total monetary value of DALYs lost in 2015 was attributed to CMNNDs, NCDs, and INJ, respectively49. In Kenya, about 56.6%, 35.9%, and 7.4% of the total monetary value of DALYs was ascribed to CMNND, NCDs, and INJ, respectively46. In Zambia, 62.5%, 31.2%, and 6.3% was attributed to CMNNDs, NCDs, and INJ, respectively50. Therefore, it is evident that the lion’s share of the monetary value of DALYs lost in Mauritius was from NCDs, unlike in the AMU, CEMAC, EAC, Kenya, and Zambia, where CMNNDs dominated.

The diseases and injuries related to SDG 3 targets 3.1-3.4 and 3.6 caused DALY loss valued at Int$ 8.67 billion, that is, 91.6% of the total monetary value of DALYs lost in Mauritius. We found that full attainment of the five targets would yield an estimated Int$ 2.4 billion saving in monetary value of SDG-related DALYs lost by 2030. This saving is about 27.7% of SDG-related DALYs.

SDG Targets 3.1 and 3.2: Maternal and neonatal disorders

Attainment of the national targets related to SDG3 targets 3.1 and 3.2 by 2030 would avert DALYs with a monetary value of Int$ 109.9 million. The projected savings could be achieved assuming full implementation of the national sexual and reproductive health policy65, the health sector strategic plan 2020-202453, the sexual and reproductive health strategy and plan of action66, and the white paper on health sector development and reform67. The existing national legal framework in underpins the implementation of those policy and strategic documents68.

The formulation and implementation of the national policy and strategies are buttressed by the SADC strategy for sexual and reproductive health rights69; the SADC regional gender-based violence strategy and framework for action70; the AU ministers of health commitments on universal health coverage71 and ending preventable maternal and child deaths in Africa72; the AU Assembly decision on progress on maternal, newborn, and child health73; and the AU Assembly declaration on addressing social determinants of health using health in all policies approach74.

Mauritius’ efforts to reduce child and maternal morbidity, disability, and deaths are informed and supported by various pertinent WHO Governing Bodies resolutions, for example, the Regional Committee for Africa strategic plan for immunization75 and its resolution76; the World Health Assembly (WHA) resolution on reduction of perinatal and neonatal mortality77; the global vaccine action plan78 and related WHA resolution79; and the global strategy for women’s, children’s, and adolescents’ health 2016-203080,81 plus the associated WHA resolution82.

The UNGA resolutions on the rights of the child83,84 and preventable maternal mortality and morbidity and human rights85 provide high-level political backing for full implementation of Mauritius’ policies and strategies.

SDG Target 3.3: HIV/AIDS, TB, acute hepatitis, and neglected tropical diseases

The achievement of national targets for SDG target 3.3 by 2030 would avert DALYs with a monetary value of Int$ 53.45 million from HIV/AIDS, Int$ 9 million from TB, Int$ 0.97 million from acute hepatitis, and Int$ 62.2 million from NTDs. Therefore, the full attainment of target 3.3 could enable Mauritius to save DALYs with a total monetary value of Int$ 125.6 million. These savings are achievable if the following plans are made universally accessible to all people in need: communicable disease prevention and control services planned in chapter 7 of the Mauritius health sector strategy53; the national HIV and AIDS policy86; the national HIV action plan87; and the national multi-sectoral HIV and AIDS strategic framework88. The implementation of pertinent policies, strategies, and plans is augmented with the national legal framework68.

Mauritius’ battle against HIV/AIDS, TB, and hepatitis is also guided by the SADC strategy for HIV prevention, treatment, and care and sexual and reproductive health89; the framework for the prevention and control of sexually transmitted infections90; the strategic plan for the control of TB91; and the advocacy strategy on HIV/AIDs, TB, and sexually transmitted infections92.

Moreover, communicable disease control policies, strategies, and plans in Mauritius and the SADC are informed and reinforced by the WHO Governing Bodies documents and resolutions, including the end TB strategy57; the global health sector strategy on HIV56; the HIV/AIDS strategy for the African Region93 and resolution AFR/RC62/R294; the global health sector strategy on viral hepatitis59; the framework for action on prevention, care and treatment of viral hepatitis in the African region95 and resolution AFR/RC64/R596; the global health sector strategy on sexually transmitted infections97; NTDs98; the regional strategy on NTDs in the WHO African Region99 and its resolution AFR/RC63/R6100; the global vector control response strategy58 and its resolution WHA70.16101; the regional strategy for integrated disease surveillance and response102 and its draft resolution AFR/RC69/WP2/Rev1103; and the health promotion strategy for the African region104 and resolution AFR/RC62/R4105.

The implementation of the aforementioned national policies and strategies on communicable diseases is bolstered by many relevant political decisions/declarations/resolutions of the AU106-110 and the UNGA111-115.

SDG Target 3.4: Non-communicable diseases

We estimate that Mauritius could avert DALYs worth Int$ 1.95 billion if it successfully decreases the NCD burden by 24.4% between 2020 and 2030. Such savings can be realized if Mauritius were to make accessible, to everyone in need (i.e. with the capacity to benefit), the prevention and control health interventions and services planned in the health sector strategic plan53; the national sport and physical activity policy116; the national cancer control programme action plan117; and the national action plan on tobacco control118. The implementation of NCD strategies and plans is supported by the set of national legislation68,119; and the UNGA Political Declaration on the prevention and control of NCDs as well as the AU commitment on NCDs120,121.

The Mauritius NCD strategies and plans were partially informed by various WHA and RC resolutions on global strategy for the prevention and control122 and its resolution WHA53.17123; the global action plan for the prevention and control of NCD124 and its endorsing resolution WHA66.10125; the global action plan on the public health response to dementia126 and related resolution WHA70(17)127; the comprehensive mental health action plan128 and its resolution WHA66.8129; the WHO Framework Convention on Tobacco Control130 and related resolution WHA53.16131; strategies to reduce the harmful use of alcohol resolution WHA61.4132; cancer prevention and control resolution WHA70.2133; the global action plan 2014-2019 on universal eye health134 and its resolution WHA66.4135; the global action plan on physical activity resolution WHA71.6136; the NCD regional strategy for the African region137 and its resolution AFR/RC50/R4138; the Brazzaville declaration on NCD prevention and control in the African region139 and its resolution140; the strategic plan to reduce the double burden of malnutrition141 and its resolution AFR/RC69/WP1/Rev1142; the regional oral health strategy143 and the resolution AFR/RC66/R1144; and the health promotion strategy for the African region104 and its resolution AFR/RC62/R4105.

The UNGA Declaration on NCDs145, ageing146,147, food148, and nutrition149 commits the Mauritius government to provide high-level political leadership and requisite resources to prevent and control NCDs.

SDG Target 3.6: Road injuries

Mauritius could avert DALYs with a monetary value of Int$ 214.4 million if it were to successfully reduce road injuries by 99.9% between 2020 and 2030. With a view to realizing those potential savings, related to the attainment of SDG target 3.6, the government would need to fully implement its national road safety strategy 2016-2025, whose overarching objective is to achieve a 50% reduction in the number of non-fatal injuries and deaths by 2025150. The strategy has 10 strategic fields of action, namely, improving safety standards of road infrastructure; reorganising control of roadworthy vehicles; strengthening of road traffic law and enforcement; re-engineering of the driving licensing scheme; improving medical testing of fitness to drive; provision of post-crash trauma care; starting a road safety academy; creating a transport and road safety research and development programme; launching an effective education and communication strategy; and funding implementation of the road safety strategy150. The institutions mandated by the Road Traffic Act to spearhead the implementation of the strategy are the National Transport Authority and National Road Safety Council151.

The development of Mauritius’ national road safety strategy was informed by the AU road safety charter152, the AU road safety action plan 2011-2020153, the WHO global plan for the decade of action for road safety154, the WHO global 2018 status report on road safety155, the 69th WHA resolution on the outcome of the second global high-level conference on road safety156, and the status report on the implementation of the decade of action for road safety in the African region157.

The UNGA resolutions A/RES/64/255158, A/RES/66/260159, A/RES/68/269160, A/RES/70/260161, A/RES/72/271162, and A/RES/70/16 provide high-level political support for full implementation of the Mauritian national road safety strategy 2016-2025 to at least halve the number of transport-related non-fatal injuries and human lives.

Limitations

This study has limitations related to the GDP calculations, the human capital approach, and the DALYs index.

Limitations in GDP calculations: The per capita GDP was used in this study as a numeraire for converting DALYs lost into their monetary equivalent. The current systems of national accounts measure GDP without considering unpaid household production (e.g. full-time homemakers’ services in a household, including cooking, cleaning, childcare, and nursing ailing household members) and leisure; or the contribution of the elderly in reconciling differences among family members (social cohesion) and transmitting community values and indigenous knowledge to children and youth163. The index also does not capture the adverse effects of economic production processes on the environment, animal health, and human health164. Moreover, GDP does not account for inequalities in the distribution of income and wealth across households and individuals165, and its growth does not indicate whether the societal quality of life has improved166.

Limitations in the human capital approach: Strictly applied, the use of the human capital approach would have confined the analysis only to marketed production and working population. Therefore, DALYs lost within the age groups below the minimum legal age for working167 and above retirement age of 60 years and above168 would have been monetarily valued at zero. Furthermore, the DALYs lost among people who cannot work due to disability would be valued at zero. However, since the constitution of Mauritius68,119, the constitution of the WHO169, and the UN Universal Declaration of Human Rights170 prohibit discrimination against any person, we value every DALYs lost (irrespective of age group) at the same non-health GDP per capita. Our approach is consistent with the lifetime income-based approach developed and applied by Jorgenson and Fraumeni171-174 in the context of education-related human capital.

Limitations in the DALYs calculations: We summarize some of the limitations, already discussed by the GBD Study, that are inherent in the calculation of the two components (YLD and YLL) of the DALYs. According to the GBD 2017 Mortality Collaborators175, the mortality data used ‘include vital registration systems, sample registration systems, household surveys (complete birth histories, summary birth histories, sibling histories), censuses (summary birth histories, household deaths), and Demographic Surveillance Sites’ (p. 1684). Some of the limitations include the use of sibling history data, which may introduce survivor bias and recall bias; estimates of the completeness of vital registration are based on the use of uncertain death distribution methods; and they cannot capture all fatal discontinuities176. Unlike the rest of the WHO African region, where the completeness of the primary cause of death data is 6% owing to fragile vital registration systems, in Mauritius, the proportion is 100%11, meaning that mortality estimates are likely to be more accurate than in the rest of the region.

According to the GBD 2017 Disease and Injury Incidence and Prevalence Collaborators176, ‘YLDs were estimated as the product of a prevalence estimate and a disability weight for health states of each mutually exclusive sequela, adjusted for comorbidity’ (p.1789). Some of the limitations highlighted by authors include the fact that even though comorbidity distributions are known to vary by cause, age, sex, location, and time, the comorbidity adjustment in GBD 2017 assumes independent distributions of comorbid conditions. In addition, calculations of GBD for some causes depend strongly on clinical data, which are prone to selection bias for segments of the population that have disproportionate access to health services176.

In the DALY calculations, the GBD 2017 DALYs and HALE Collaborators42 assume independence of uncertainty between YLLs and YLDs, even though this assumption may lead to underestimation of the total uncertainty for DALYs. The authors also highlight that DALY estimates are influenced by the availability of data for YLL and YLD estimations.

Conclusion

The DALYs lost had a substantive monetary value equivalent to 31.4% of GDP for Mauritius in 2019. Full achievement of the national targets related to SDG3 targets 3.1-3.4 and 3.6 would save the country about Int$ 2.4 billion, or 8% of total GDP in 2019. If fully implemented, Mauritius’ health-related policies, strategies, and plans might give the country a high chance of averting a significant number of DALYs. The implementation process is also buttressed with a robust legislative framework aimed at addressing the causes of ill-health in Mauritius.

However, as the AU ministers of health underscored in their commitment on an accountability mechanism, the existence of policies, strategies, declarations, decisions, and resolutions does not necessarily assure attainment of national and internationally agreed health development goals177. The health ministers called on governments and other relevant stakeholders at national, regional, and continental levels to provide committed, sustained, and aligned resources for accelerated and monitored implementation of a national health development policy framework.

In terms of all socioeconomic indicators, Mauritius has accomplished substantially more than the other 46 WHO African region countries11. However, to sustain the health (and related) gains, it is essential not to be complacent. Therefore, it is vital for the Mauritius government and the domestic private sector to work together to strengthen further the national health system (including the social protection mechanisms to reduce reliance on OOPS), the other systems that tackle social determinants of health16, and the national health research system178,179 to reduce the burden of disease further and to advance the quality of life of the people of Mauritius. Finally, given the negative economic impact of the ongoing COVID-19 global pandemic180, all health-related systems ought to ensure that all resources are utilized efficiently53,181.

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Musango L, Nundoochan A, Van Wilder P and Kirigia JM. Monetary value of disability-adjusted life years lost from all causes in Mauritius in 2019 [version 1; peer review: peer review discontinued]. F1000Research 2021, 10:63 (https://doi.org/10.12688/f1000research.28483.1)
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