Between 1985 and 2019, the mean height of 19-year-old males in China increased by 8.0 cm, the largest national gain on record. Over the same period, mean height declined in several countries in sub-Saharan Africa and the Pacific. The international distribution widened rather than converged.
Adult height reflects cumulative childhood nutrition, infectious-disease burden, and the quality of perinatal and postnatal care. The NCD Risk Factor Collaboration (NCD-RisC) reconstructed mean height for boys and girls aged 5 to 19 across 200 countries from 1985 to 2019, drawing on more than 2,300 population-based studies and over 65 million participants. The resulting trajectories provide a long-run, biologically grounded indicator of childhood living conditions, and they reveal a pattern of growing rather than narrowing international inequality.
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Top and bottom five countries by year
Mean height of 19-year-old males. Drag the marker to select a year between 1985 and 2019.
Tallest five
Shortest five
Difference between the two group means: ... cm
Source: NCD-RisC. 200 countries, ages 5 to 19, 1985 to 2019.
In 2019, the Netherlands recorded the highest mean height at 183.8 cm, while Timor-Leste recorded the lowest at 160.1 cm, a difference of 23.7 cm. The corresponding range in 1985 was 18.6 cm. Despite three decades of rising aggregate global income, the distance between the tallest and shortest national means widened by approximately 5 cm.
The East Asian gain
The largest national-scale gains in the dataset occur in East Asia. Mean height of 19-year-old males in China rose from 167.6 cm to 175.7 cm, an increase of 8.0 cm. South Korea added 6.8 cm and Saudi Arabia added 6.6 cm. These increases coincide with sustained growth in per-capita income, urbanization, expansion of childhood nutrition and immunization programs, and improvements in maternal and child health services.
Selected national trajectories
Seven countries plotted against 193 others
Each colored line tracks one country’s mean height of 19-year-old males from 1985 to 2019. Faint gray lines show the remaining countries for context.
Click a chip to toggle a country. Source: NCD-RisC.
The trajectories show three distinct regimes. The Chinese series accelerates through the 1990s and 2000s, crossing the United States by the mid-2010s. The Netherlands, already near the upper bound of the distribution, exhibits little additional gain. Lesotho declines slightly. India gains modestly, on the order of 2 to 3 cm over the full period.
Countries with negative trends
At least eight countries registered net declines in the mean height of 19-year-old males between 1985 and 2019, mostly in sub-Saharan Africa and several in the Pacific. Such declines are uncommon in long-run height series and typically signal sustained deterioration in childhood nutrition, conflict-related disruption of food systems and health services, or rising burden of infectious disease during the growth years.
1985 versus 2019
Change in mean height across all 200 countries
Each line is one country: its 1985 mean on the left, its 2019 mean on the right. Color encodes the magnitude of change.
Source: NCD-RisC. NCD Risk Factor Collaboration.
Interpretation
Population mean height is a slow-moving variable. A change of 1 cm typically requires sustained changes in childhood conditions across one or more cohorts. Aggregate global gross domestic product approximately tripled in real terms between 1985 and 2019, yet the international distribution of childhood height widened rather than narrowed. The data therefore suggest that economic growth at the global level is a poor proxy for whether childhood living conditions are improving in any specific national context. The remaining empirical questions concern which interventions, in which combinations, are sufficient to shift the trajectory of countries that have stalled or regressed over the past three decades.