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Physical activity and sleep time in the study children
| Characteristics | Case group (n = 105) |
Control group (n = 105) |
χ2 | P trend | |
|---|---|---|---|---|---|
| Sleeping time (hours/day) | < 8 | 29(27.62) | 20(19.05) | 5.39 | 0.07 |
| 8 ~ 10 | 59(56.19) | 55(52.38) | |||
| > 10 | 17(16.19) | 30(28.57) | |||
| Physical Exercise (hours/day) | 0 | 24(22.86) | 15(14.29) | 12.64 | < 0.01** |
| ≤ 1 | 58(55.24) | 43(40.95) | |||
| 2–3 | 18(17.14) | 35(33.33) | |||
| > 3 | 5(4.76) | 12(11.43) | |||
*P<0.05 **P<0.01 ***P<0.001
