Table 1.
Demographic Characteristics in Adolescents with Sufficient and Insufficient Sleep
| Variables | Total (n=22231) | Sufficient sleep (n=7188) | Insufficient sleep (n=15043) | Z/t/χ2 | p |
|---|---|---|---|---|---|
| Age (mean±SD) | 14.10±0.92 | 13.97±0.92 | 14.16±0.91 | −14.570 | <0.001 |
| Sex (girls, %) | 11,050(49.7) | 2933(40.8) | 8117(54.0) | 336.674 | <0.001 |
| BMI, median (IQR) | 19.53(5) | 19.38(6) | 19.53(5) | −2.481 | 0.013 |
| Boarding student (Yes,%) | 5205(23.4) | 1793(24.9) | 3412(22.7) | 13.888 | <0.001 |
| Parental marital status (N,%) | 52.818 | <0.001 | |||
| Married | 19904(89.5) | 6584(91.6) | 13,320(88.5) | ||
| Divorced | 1197(5.4) | 287(4.0) | 910(6.0) | ||
| Remarried | 785(3.5) | 218(3.0) | 567(3.8) | ||
| Single-parent | 345(1.6) | 99(1.4) | 246(1.6) | ||
| Parent–child relationship (N, %) | 209.023 | <0.001 | |||
| Poor | 666(3.0) | 147(2.0) | 519(3.5) | ||
| Average | 5273(23.7) | 1330(18.5) | 3943(26.2) | ||
| Good | 16292(73.3) | 5711(79.5) | 10,581(70.3) | ||
Abbreviations: BMI, Body Mass Index; PHQ-9, Patient Health Questionnaire for depression.