Multivariate analyses of physical activity and sedentary behaviours and constipation.

#<p>adjusting for sex, age, perceived family affluence, fruit and vegetable intake, and depression and anxiety symptoms;</p><p>*p<0.05, **p<0.01.</p><p>Index: created after combining the three unhealthy behaviours (physical activity less than 1 hour/d, NEPA less than 1 hour/d, and screen time of at least 4 hours/d).</p

Background information of subjects with constipation and without constipation (N = 32371).

a<p>P value was from Student's t-test.</p>b<p>including TV/video watching and network use/computer games.</p><p>Abbreviations: NEPA (non-exercise physical activity), NA (Not applicable).</p>c<p>the sum of students in each category for each variable may not be equal to the total number due to missing values.</p

Receiver operating characteristic (ROC) curves for overweight/obesity in boys and girls.

<p>Self-reported BMI had the greatest AUC for both sexes. In boys, CBS had a higher AUC than WSR and WC, while in girls the AUCs of CBS, WSR and WC were comparable. (A) AUC for boys: self-reported BMI (0.89); CBS (0.85); self-reported WC (0.80); self-reported WSR (0.78). (B) AUC for girls: self-reported BMI (0.90); CBS (0.81); self-reported WC (0.82); self-reported WSR (0.82).</p

Receiver operating characteristic (ROC) curves for underweight in boys and girls.

<p>Apart from BMI, CBS had the greatest AUC in both boys and girls. (A) AUC for boys: self-reported BMI (0.89); CBS (0.82); self-reported WC (0.72); self-reported WSR (0.70). (B) AUC for girls: self-reported BMI (0.88); CBS (0.81); self-reported WC (0.77); self-reported WSR (0.76).</p

Optimal current body size cut-offs for overweight/obesity and underweight by sex and age.

<p>CBS: current body size; J: Youden index; LR+: positive likelihood ratio.</p