Table 4 Odds ratios (OR) and 95% confidence intervals (95% CI) of predictors of overweight/obesity in participants by educational stage^a

Sex

Male

Reference

Reference

Reference

Female

0.383 (0.320–0.458)^***

0.753 (0.514–1.102)

0.483 (0.390–0.598) ^***

Age

0.810 (0.702–0.935)^**

0.874 (0.713–1.070)

0.933 (0.804–1.083)

Indoor PA time (m/day)^†

< 30

Reference

Reference

Reference

30–60

0.956 (0.774–1.180)

0.894 (0.587–1.361)

1.230 (0.959–1.577)

> 60

0.917 (0.710–1.184)

1.296 (0.785–2.138)

0.977 (0.685–1.392)

Outdoor PA time (m/day)

< 30

Reference

Reference

Reference

30–60

0.884 (0.700–1.115)

0.806 (0.473–1.375)

1.194 (0.922–1.545)

> 60

0.753 (0.584–0.969)

0.809 (0.473–1.384)

1.399 (1.041–1.880)

Academic stress^b

1.002 (0.918–1.094)

1.092 (0.876–1.362)

1.029 (0.916–1.156)

Mental health^c

Poor

Reference

Reference

Reference

Good

0.869 (0.676–1.118)

0.774 (0.502–1.194)

1.156 (0.924–1.446)

Non-smartphone screen time (h/day)

1.045 (0.998–1.095)

0.948 (0.861–1.044)

0.982 (0.918–1.050)

PSU for social network (out of 30 points)^‡,d

0.994 (0.967–1.021)

1.005 (0.960–1.053)

0.986 (0.963–1.008)

PSU for entertainment (out of 20 points)

1.030 (1.005–1.057)^*

0.995 (0.947–1.045)

1.031 (1.004–1.059) ^*

PSU for information collection (out of 15 points)

0.998 (0.970–1.027)

1.015 (0.951–1.083)

1.006 (0.966–1.046)