부산대학교 도서관

Background Prevalence of underweight has decreased and that of obesity increased in most countries. A shift of the whole BMI distribution in the population would simultaneously change the mean BMI and the prevalence of underweight and obesity, whereas a change only at the tails would have limited impact on the mean. Methods Generalised linear regression of prevalence of underweight and obesity with mean BMI using worldwide data from 2,765 surveys with objectively measured height and weight on 143.5 million men and women aged 20 to 79 years from 1985 to 2016. Results Trends in the prevalence of underweight and obesity are largely driven by shifts in the distribution of mean BMI, with smaller contributions from changes in the shape of the distribution. There was a smaller than expected change in the decline of underweight in east and southeast Asia and sub-Saharan Africa and in the rise of obesity in Oceania. Conclusions The worldwide rise in obesity and decline in underweight are largely population phenomena. There is also evidence of excess obesity and persistent underweight beyond the distributional shift in some regions, which may be related to growing social inequalities that restrict access to healthy foods for those at highest risk of poor nutrition. Key messages Rise in obesity and decline of underweight are largely driven by increase in mean BMI. Effective response must include restrictions on unhealthy foods while making healthy options more accessible. [ABSTRACT FROM AUTHOR]