Drivers of Inequality in Millennium Development Goal Progress: A Statistical Analysis
David Stuckler1,2*, Sanjay Basu3,4, Martin McKee2,5
1 Oxford University, Department of Sociology, Oxford, United Kingdom,
2 London School of Hygiene & Tropical Medicine, Department of Public Health and Policy,London, United Kingdom,
3 Department of Medicine, University of California San Francisco, San Francisco, California, United States of America,
4 Division of General Internal Medicine, San Francisco General Hospital, San Francisco, California, United States of America,
5 European Observatory on Health Systems and Policies,
PLoS Med 7(3): e1000241. doi:10.1371/journal.pmed.1000241
Academic Editor: Simon Hales,
Available online at; http://www.plosmedicine.org/article/info%3Adoi%2F10.1371%2Fjournal.pmed.1000241
Many low- and middle-income countries are not on track to reach the public health targets set out in the Millennium Development Goals (MDGs). We evaluated whether differential progress towards health MDGs was associated with economic development, public health funding (both overall and as percentage of available domestic funds), or health system infrastructure.
We also examined the impact of joint epidemics of HIV/AIDS and noncommunicable diseases (NCDs), which may limit the ability of households to address child mortality and increase risks of infectious diseases.
Methods and Findings:
We calculated each country’s distance from its MDG goals for HIV/AIDS, tuberculosis, and infant and child mortality targets for the year 2005 using the United Nations MDG database for 227 countries from 1990 to the present. We studied the association of economic development (gross domestic product [GDP] per capita in purchasing-powerparity), the relative priority placed on health (health spending as a percentage of GDP), real health spending (health system expenditures in purchasing-power-parity), HIV/AIDS burden (prevalence rates among ages 15–49 y), and NCD burden (agestandardised chronic disease mortality rates), with measures of distance from attainment of health MDGs.
To avoid spurious correlations that may exist simply because countries with high disease burdens would be expected to have low MDG progress, and to adjust for potential confounding arising from differences in countries’ initial disease burdens, we analysed the variations in rates of change in MDG progress versus expected rates for each country. While economic development, health priority, health spending, and health infrastructure did not explain more than one-fifth of the differences in progress to health MDGs among countries, burdens of HIV and NCDs explained more than half of between-country inequalities in child mortality progress (R2-infant mortality = 0.57, R2-under 5 mortality = 0.54). HIV/AIDS and NCD burdens were also the strongest correlates of unequal progress towards tuberculosis goals (R2 = 0.57), with NCDs having an effect independent of HIV/AIDS, consistent with micro-level studies of the influence of tobacco and diabetes on tuberculosis risks.
Even after correcting for health system variables, initial child mortality, and tuberculosis diseases, we found that lower burdens of HIV/ AIDS and NCDs were associated with much greater progress towards attainment of child mortality and tuberculosis MDGs than were gains in GDP. An estimated 1% lower HIV prevalence or 10% lower mortality rate from NCDs would have a similar impact on progress towards the tuberculosis MDG as an 80% or greater rise in GDP, corresponding to at least a decade of economic growth in low-income countries.
Conclusions:
Unequal progress in health MDGs in low-income countries appears significantly related to burdens of HIV and NCDs in a population, after correcting for potentially confounding socioeconomic, disease burden, political, and health system variables. The common separation between NCDs, child mortality, and infectious syndromes among development programs may obscure interrelationships of illness affecting those living in poor households—whether economic (e.g., as money spent on tobacco is lost from child health expenditures) or biological (e.g., as diabetes or HIV enhance the risk of tuberculosis)….”
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