Data Sheet 4_Physical activity, entertainment screen time, and dietary fat profiles and concurrent weight status among school-attending Chinese children and adolescents: CHNS 2004–2011.pdf

The exact BIC-preferred number of profiles varied across survey waves, age groups, and model specifications, and 48.4% of observations had a maximum posterior probability below 0.70. The estimated prevalence of overweight/obesity, accounting for profile-membership uncertainty, was highest in the very-low-activity profile (24.4%) and was 16.4% in the reference profile. This descriptive difference attenuated after adjustment (odds ratio, 1.18; 95% confidence interval, 0.81–1.69), and the fully adjusted global profile test was non-significant (p = 0.806).

Multinomial models separating overweight and obesity, continuous BMI and approximate WHO BMI-for-age z-score models, multiple imputation, and inverse-probability weighting produced the same overall conclusion.</p>Conclusion<p>In the 2004–2011 CHNS analytic sample, the measured behaviors formed heterogeneous combinations, but the selected profiles did not independently distinguish concurrent weight status after adjustment.

The findings are historical and sample-specific; they should not be interpreted as current national profile distributions or as validation of profile-based interventions.</p>