Lower middle income

Income level is one of the strongest predictors of a country's disease burden and mortality profile. Lower middle income countries share common patterns in healthcare spending, infrastructure capacity, and population demographics that shape their leading causes of death. The World Bank classifies countries into four income groups based on gross national income per capita.

Use this page to compare mortality across lower middle income nations and explore how economic development relates to health outcomes. Data is sourced from the IHME Global Burden of Disease Study 2023.

Lower-middle-income countries (GNI per capita approximately $1,136-$4,465) face the full complexity of the 'triple burden': persistent communicable diseases, rising non-communicable diseases, and high injury mortality, all compounded by weak health systems and limited fiscal space. This group includes India, Bangladesh, Nigeria, Pakistan, Kenya, Vietnam, and Egypt — nations where the majority of the world's preventable deaths occur. Life expectancy averages 66-72 years. Under-five mortality rates range from 20 to 70 per 1,000 live births, with pneumonia, diarrhoea, malaria, and malnutrition remaining dominant killers of children. Maternal mortality is substantially elevated compared to upper-middle and high-income settings, driven by limited access to skilled birth attendance and emergency obstetric care. Tuberculosis prevalence is high, with India alone accounting for roughly one-quarter of the global TB burden. Cardiovascular disease has emerged as the leading cause of adult death, but occurs at younger ages than in wealthy countries due to earlier onset of hypertension, diabetes, and tobacco-related disease. Air pollution — both household (from solid fuel cooking) and ambient (from industrialisation without environmental regulation) — is a major risk factor, contributing to an estimated 3.8 million deaths annually in this income category.

Health systems in lower-middle-income countries are characterised by chronic underfunding (health spending typically 3-5% of GDP), severe health worker shortages (often below 10 physicians per 10,000 population), weak primary care infrastructure, and heavy reliance on out-of-pocket payments — which constitute 40-60% of total health expenditure in many countries. External development assistance for health remains important but is declining as a share of total health financing. Supply chain failures for essential medicines, limited diagnostic capacity (particularly for cancers and NCDs), and the absence of functioning referral systems contribute to avoidable mortality. Community health worker programmes, mobile health technology, and task-shifting strategies offer promising but partial solutions.

The lower middle income category encompasses 50 countries and territories in this dataset, including India, Pakistan, Nigeria, Bangladesh, Philippines, Egypt, Arab Rep., Viet Nam, and Tanzania. Explore individual country pages to see how mortality profiles vary within this income classification and how national policies and health investments shape outcomes across different causes of death.