Table 5.
Binomial regression analysis of the effect of sleep duration on total NSSI number
| Variables | Total NSSI number | |||||
|---|---|---|---|---|---|---|
| Crude OR(95%CI) | F | P value | Adjusted OR(95%CI) | F | P value | |
| Total number of NSSI | ||||||
| Daily sleep (h) | −4.01(−4.90, −3.12)** | 63.68 | < 0.001 | −2.76(−3.62, −1.91) ** | 88.36 | < 0.001 |
| Daily sleep (h) 2 | 0.23(0.18,0.29) ** | 0.17(0.11,0.22) ** | ||||
| Total number of NSSI | ||||||
| Weekday sleep (h) | −3.91(−4.58,-3.24) ** | 86.48 | < 0.001 | −2.59(−3.25,-1.94) ** | 89.48 | < 0.001 |
| Weekday sleep (h) 2 | 0.24(0.20,0.29) ** | 0.17(0.12,0.21) ** | ||||
| Total number of NSSI | ||||||
| Weekend sleep (h) | −2.14(−2.61,-1.67)** | 42.74 | < 0.001 | −1.14(−1.60,-0.69) ** | 86.95 | < 0.001 |
| Weekend sleep (h) 2 | 0.11(0.09,0.14) ** | 0.06(0.03,0.08) ** | ||||
| Total number of NSSI | ||||||
| catch-up sleep (h) | −0.36(−0.47,-0.26) ** | 52.88 | < 0.001 | −0.24(−0.34,-0.15) ** | 87.36 | < 0.001 |
| catch-up sleep (h) 2 | 0.10(0.08,0.12) ** | 0.05(0.04,0.07) ** | ||||
* P < 0.05, ** P < 0.001; OR is odds ratios; CI is confidence interval; NSSI is non-suicidal self-injury; Adjusted model controlled regional areas, sex, grade, registered residence, only child, parents’ education level, family economic status, sleep quality, psychological symptoms, weekday video time, weekend video time, weekday video game time, weekend video game time