Table 3.
The regression of screen time and sedentary time on early puberty and precocious puberty according to sex.
| Variables | Model 1 | Model 2 | Model3 | Model4 | ||||
|---|---|---|---|---|---|---|---|---|
| OR (95% CI) | P | OR (95% CI) | P | OR (95% CI) | P | OR (95% CI) | P | |
| Boys | ||||||||
| Screen time(h/day) | ||||||||
| <2 | 1.00 | 0.550 | 1.00 | 0.698 | 1.00 | 0.726 | 1.00 | 0.581 |
| ≥2 | 1.214 (0.642,2.295) | 1.139 (0.590,2.199) | 1.125 (0.582,2.177) | 1.211 (0.614,2.388) | ||||
| Sedentary time(h/day) | ||||||||
| <2 | 1.00 | 0.499 | 1.00 | 0.441 | 1.00 | 0.497 | 1.00 | 0.686 |
| ≥2 | 1.381 (0.541,3.528) | 1.471 (0.551,3.930) | 1.412 (0.522,3.817) | 1.230 (0.450,3.360) | ||||
| Girls | ||||||||
| Screen time(h/day) | ||||||||
| <2 | 1.00 | 0.405 | 1.00 | 0.600 | 1.00 | 0.578 | 1.00 | 0.525 |
| ≥2 | 1.132 (0.846,1.515) | 0.917 (0.664,1.268) | 0.911 (0.658,1.263) | 0.898 (0.646,1.249) | ||||
| Sedentary time(h/day) | ||||||||
| <2 | 1.00 | 0.010 | 1.00 | 0.075 | 1.00 | 0.087 | 1.00 | 0.083 |
| ≥2 | 1.428 (1.087, 1.876) | 1.315 (0.973,1.778) | 1.304 (0.963,1.766) | 1.310 (0.965,1.778) | ||||
Model 1: no adjustment. Model 2: adjusted for age and BMI. Model 3: further adjusted for MVPA and sleep duration. Model 4: further adjusted for parents’ education level and total family income.
P < 0.05 was marked in bold.