Skip to main content
. 2021 Jul 22;114(4):1495–1504. doi: 10.1093/ajcn/nqab237

FIGURE 2.

FIGURE 2

Change in mean %BF, mean FMI, and mean BMI among children and adolescents aged 8–19 y from 1999–2006 to 2011–2018 by age group, race and Hispanic origin, and BMI category—United States. (A) Among males, (B) among females. Estimates were calculated using examination sample weights and accounted for the survey's complex, multistage probability design. Mean differences were averaged across imputations. SEs were pooled across imputations using within-imputation and between-imputation variances. Significance testing was performed using a t-distribution with adjusted df. 95% CIs are provided. Overall sample sizes: males during 1999–2006, n = 5933; males during 2011–2018, n = 3584; females during 2001–2006, n = 4298; females during 2011–2018, n = 3339. Source: National Center for Health Statistics, NHANES. For the 1999–2006 time period, female data include only 2001–2006. Data for 1999–2006 (2001–2006 in females) are standardized to the sex-specific, race and Hispanic origin–specific, and 6-mo age–specific distributions of 2011–2018 to allow for comparison across time frames. *,**Significant change: *P < 0.05; **P < 0.01. FMI, fat mass index; %BF, percentage body fat.