Thin at ten, heavier at fifty-seven: what a recalled childhood adds

Researchers at Huazhong University of Science and Technology in Wuhan used the UK Biobank, which enrolled more than half a million British adults between 2006 and 2010¹. At enrolment, at an average age of about 57, people were asked one question about their childhood: at ten, were you thinner than average, about average, or plumper? Their adult size was measured. Crossing the two answers gave nine patterns, and the team followed 447,821 people without a prior diagnosis for a median of 12.6 years¹.

The group that stood out had been thinner at ten and was in the heaviest sixth as adults. Compared with people average at both ages, it had a 90% higher rate of hospital-diagnosed depression and a 58% higher rate of anxiety¹. In raw counts, 1,604 of 16,851 people in that group received a depression diagnosis, about 9.5%, against about 4.3% of the average-to-average group¹. Being thin as a child carried little extra risk on its own: those who stayed slimmer had roughly the reference rate of depression¹.

Two details keep the finding honest. Adult size carried most of the signal: all three groups with a high adult BMI had the highest risks, whatever their childhood size¹. And lifestyle habits, high blood pressure, type 2 diabetes and heart disease together accounted for only about 22% of the extra risk, which leaves most of it unexplained¹.

The limits are plain. Childhood size was remembered in middle age, not measured; adult groups were relative bands, not clinical categories; the volunteers were white, healthier and better off than Britain as a whole; and the design shows association, not cause¹. The authors suggest that a large change in body size may bring shifts in self-image, weight stigma and health worries along with metabolic changes, but they did not test that¹.

So the useful reading for you is modest. A single adult weight on a chart says less than the path to it. If a GP is weighing someone, asking how they felt about their body over the years costs one minute and may say more than the scale. And since stigma is itself linked to worse mental health, the finding is a case for attention and support, not for blame¹.