- Underestimation of weight status increased, and overestimation of weight status decreased over time among both sexes, with stronger trends for girls.
- Correct weight perception increased over time among girls, while it decreased among boys.
- Changes in correct weight perception, underestimation and overestimation of weight status differed across different countries—but these changes could not be explained by an increase in country-level overweight/obesity prevalence.
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