Table 1.
Characteristics of study sample
| Characteristic | All N=2,854 | Poor Sleep Quality N=1,373 | Good Sleep Quality N=1,481 | P-value |
|---|---|---|---|---|
|
| ||||
| n (%) | n (%) | n (%) | ||
| Age (Mean± SD) | 20.3±1.3 | 20.4± 1.3 | 20.3 ±1.3 | 0.242 |
| Age (years) | ||||
| 18 | 153 (5.4) | 66 (4.8) | 87 (5.9) | 0.49 |
| 19 | 663 (23.5) | 307 (22.4) | 356 (24.0) | |
| 20 | 823 (28.8) | 403 (29.3) | 420 (28.4) | |
| 21 | 669 (24.5) | 351 (25.6) | 348 (23.5) | |
| 22 and older | 516 (18.2) | 246 (17.9) | 270 (18.2) | |
| Sex | ||||
| Male | 930 (32.6) | 435 (31.7) | 495 (33.4) | 0.321 |
| Female | 1,924 (67.4) | 938 (68.3) | 986 (66.6) | |
| Cigarette smoking status | ||||
| Never | 2,603 (91.2) | 1,237 (90.1) | 1,366 (92.2) | 0.131 |
| Former | 55 (1.9) | 30 (2.2) | 25 (1.7) | |
| Current | 196 (6.9) | 106 (7.7) | 90 (6.1) | |
| Alcohol consumption | ||||
| <1 drink/month | 1879 (65.8) | 877 (63.9) | 1002 (67.7) | 0.02 |
| 1-19 drinks/month | 928 (32.5) | 466 (33.9) | 462 (31.2) | |
| ≥ 20 drinks/month | 47 (1.6) | 30 (2.2) | 17 (1.1) | |
| Body mass index (kg/m2) | ||||
| Underweight (<18.5) | 476(16.7) | 241 (17.5) | 235 (15.9) | 0.082 |
| Normal (18.5–24.9) | 1,957(68.6) | 947 (69.0) | 1010 (68.2) | |
| Overweight (25.0–29.9) | 288 (10.1) | 119 (8.7) | 169 (11.4) | |
| Obese (≥30.0) | 133(4.6) | 66 (4.8) | 67 (4.5) | |
| Any physical activity | ||||
| No | 629 (22.1) | 300 (22.0) | 329 (22.3) | 0.848 |
| Yes | 2,215 (77.9) | 1,066 (78.0) | 1,149 (77.7) | |