Deaths: Ages 30-39
Deaths in the 30-39 years age group across countries, with trends from 1990 to present.
| # | Country | Deaths | Region |
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Adults in their thirties occupy a transitional mortality landscape where the external causes dominating younger age groups begin to share prominence with emerging chronic diseases. Road traffic injuries, suicide, and interpersonal violence remain significant killers, but HIV/AIDS, liver disease (from chronic hepatitis B/C and alcohol use), and certain cancers (cervical cancer, breast cancer, Hodgkin lymphoma) begin to appear in the mortality profile. In sub-Saharan Africa, HIV/AIDS is the leading cause of death for 30-39-year-olds, with women disproportionately affected due to biological susceptibility and gender-based inequalities. In high-income countries, the opioid epidemic and rising alcohol-related liver disease have driven increases in 30-39 mortality — a historically unusual trend that contributed to declining US life expectancy between 2014 and 2017. Cardiovascular disease begins to claim lives in this decade, particularly among individuals with uncontrolled hypertension, diabetes, or familial hypercholesterolaemia. Maternal mortality remains a concern in low-income settings, though it declines relative to the 20-29 group as completed fertility reduces pregnancy exposure.
Risk factors for 30-39 mortality include cumulative alcohol and tobacco exposure beginning to manifest as liver and cardiovascular disease, ongoing substance use disorders, occupational hazards, untreated HIV in settings with poor healthcare access, obesity and metabolic syndrome, intimate partner violence, and in some regions, complications of pregnancy. Mental health disorders contribute to suicide risk, particularly during life transitions such as divorce, financial stress, and job loss.
Age-specific mortality rates are calculated as the number of deaths occurring within an age group divided by the mid-year population of that same group, typically expressed per 100,000 persons. This standardization allows meaningful comparison across countries with vastly different population sizes. Age disaggregation is essential for health policy because different age groups face fundamentally different disease burdens: infectious diseases and nutritional deficiencies predominate among young children, injuries and mental health conditions peak in adolescents and young adults, and noncommunicable diseases such as cardiovascular disease and cancer dominate among older populations. This pattern reflects the epidemiological transition — as countries develop economically and invest in sanitation, vaccination, and maternal care, the age distribution of deaths shifts markedly from younger to older ages. In high-income nations, over 70% of deaths occur after age 70, whereas in low-income settings a substantial share of mortality still concentrates in children under five. Understanding these age-specific patterns is critical for allocating health budgets, designing targeted interventions, and monitoring progress toward global health goals such as the Sustainable Development targets.