Table 1.
General characteristics of adolescents’ sleep habits and sleep quality
| Sleep habits and sleep quality of adolescents | |||||
|---|---|---|---|---|---|
| When do you usually get to bed? (In hours, n %) | 20:00–21:00 | 22:00 | 23:00 | 24:00 | After 24:00 |
| 80 (66) | 272 (22.4) | 519 (42.8) | 209 (17.2) | 132 (10.9) | |
| How much time does it take to fall asleep in the nights? (In minutes, n %) | 5–10 | 15–20 | 30 | 30–45 | At least 1 hour |
| 497 (41) | 443 (36.6) | 138 (11.4) | 81 (6.7) | 53 (4.4) | |
| After falling asleep, how many times a night do you get awake? (n %) | Never | 1–2 | 3–4 | 5–7 | 8–10 |
| 600 (49.5) | 500 (41.3) | 89 (7.3) | 15 (1.3) | 8 (.7) | |
| How often do you sleep after coming from school? (n %) | Never | Rarely | Occasionally | Frequently | Always |
| 297 (24.5) | 453 (37.4) | 294 (24.3) | 122 (9.2) | 56 (4.6) | |
| How often do you drink coffee in the night? (n %) | Never | Rarely | Occasionally | Frequently | Always |
| 504 (41.6) | 370 (30.5) | 208 (17.2) | 95 (7.8) | 39 (2.9) | |
| How often do you smoke in the night? (n %) | Never | Rarely | Occasionally | Frequently | Always |
| 1135 (93.6) | 43 (3.5) | 17 (1.4) | 10 (.8) | 7 (.6) | |
| How often do you drink alcohol in the night? (n %) | Never | Rarely | Occasionally | Frequently | Always |
| 887 (73.2) | 189 (15.6) | 111 (9.2) | 14 (1.2) | 10 (.8) | |
| How do you grade your sleep quality? (n %) | Very good | Good | Moderate | Bad | Very Bad |
| 215 (17.7) | 415 (34.2) | 384 (31.7) | 145 (12) | 53 (4.4) | |