India GBD 2021 Disease Burden & Transition Analysis

What this research found

India's disease burden in 1990 and 2021 was compared using Global Burden of Disease 2021 estimates of disability-adjusted life years, broken out by broad cause group, by specific cause, and by risk factor. The composition of ill health effectively inverted across the three decades: communicable, maternal, neonatal and nutritional conditions fell from 56.9% of total burden to 27.0%, while non-communicable diseases rose from 30.0% to 62.0%. Ischemic heart disease climbed from fifth to first among individual causes, and air pollution now heads the risk-factor table at 38.0 million attributable disability-adjusted life years.

• The two dominant cause groups traded places: communicable, maternal, neonatal and nutritional conditions fell from 56.9% of disability-adjusted life years to 27.0% while non-communicable diseases rose from 30.0% to 62.0%. The first group more than halved in absolute terms, from 279 to 135 million, while the second climbed from 147 to 310 million against a near-flat total of 490 and 500 million.
• Ischemic heart disease made the largest gain in rank, from fifth in 1990 to first in 2021. Its absolute burden grew from 21.5 to 47.0 million disability-adjusted life years, a rise of 118.6%, while its age-standardised rate edged up only 4.3%, from 3,050 to 3,180 per 100,000.
• Child and infectious burden collapsed on a per-capita basis. The age-standardised rate for diarrhoeal diseases fell 83%, from 5,350 to 900 per 100,000, and for lower respiratory infections 78%, from 4,650 to 1,020. Neonatal disorders slipped from first to second place, with their rate dropping from 5,600 to 2,180.
• Diabetes recorded the steepest age-standardised increase of any leading cause, up 67.2% from 610 to 1,020 per 100,000 as it rose from tenth to sixth. Other chronic conditions rose in rank while their per-capita risk actually fell — stroke down 12.9% and chronic obstructive pulmonary disease down 35.6% — meaning population growth and ageing drove their absolute burden up regardless.
• The 2021 risk-factor ordering matches the cause profile. Air pollution led with 38.0 million attributable disability-adjusted life years (2,650 per 100,000 age-standardised), followed by high systolic blood pressure at 33.0 million, dietary risks at 31.0 million, high fasting plasma glucose at 28.0 million, and tobacco at 27.0 million.

How it was done

Disability-adjusted life year estimates for India, both sexes and all ages, were assembled from Global Burden of Disease 2021 outputs at three levels of the cause hierarchy: the three broad groups, the ten leading specific causes, and the five largest risk factors for 2021. Causes were ranked by absolute burden and reported alongside age-standardised rates per 100,000, so that genuine changes in risk exposure could be separated from the effects of population growth and ageing. Rank changes between the two years were computed directly; three causes tied at a gain of four ranks, and the tie was resolved by the higher resulting 2021 position. The comparison was written up as a six-page report with tables, figures, and machine-readable extracts of every value used.

Data sources

• IHME Global Burden of Disease Study 2021 — India, both sexes, all ages, 1990 and 2021
• GBD 2021 Diseases and Injuries Collaborators, The Lancet 403:2133 (2024) — 371 diseases and injuries across 204 countries and 811 subnational locations
• GBD 2021 Risk Factors Collaborators, The Lancet 403:2162 (2024) — 88 risk factors
• India State-Level Disease Burden Initiative analyses of epidemiological transition, cardiovascular disease, diabetes, and air pollution (2017 to 2021)