![]() The analysis revealed large differences in height between countries. The NCD Risk Factor Collaboration set out to find out how tall people are, on average, in every country in the world at the moment, and how this has changed over the past 100 years. ![]() However, they are also more likely to develop some cancers. Taller people may also earn more and be more successful at school. This is important because taller people generally live longer, are less likely to suffer from heart disease and stroke, and taller women and their children are less likely to have complications during and after birth. For example, children and adolescents who are malnourished, or who suffer from serious diseases, will generally be shorter as adults. This may be partly due to genetics, but most differences in height between countries have other causes. People from different countries grow to different heights. The height differential between the tallest and shortest populations was 19-20 cm a century ago, and has remained the same for women and increased for men a century later despite substantial changes in the ranking of countries. The tallest people over these 100 years are men born in the Netherlands in the last quarter of 20th century, whose average heights surpassed 182.5 cm, and the shortest were women born in Guatemala in 1896 (140.3 cm 135.8–144.8). In contrast, there was little change in adult height in some sub-Saharan African countries and in South Asia over the century of analysis. The largest gain in adult height over the past century has occurred in South Korean women and Iranian men, who became 20.2 cm (95% credible interval 17.5–22.7) and 16.5 cm (13.3–19.7) taller, respectively. We reanalysed 1472 population-based studies, with measurement of height on more than 18.6 million participants to estimate mean height for people born between 18 in 200 countries. ![]() Being taller is associated with enhanced longevity, and higher education and earnings. ![]()
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