Table 1.
Descriptive statistics of sleep outcome variables.
| (A) FREQUENCIES OF SLEEP HOURS | ||||||
|---|---|---|---|---|---|---|
| On average, how many hours a night do you sleep during the week? | ||||||
| Frequency | % | Cum. % | ||||
| Less than 5 h | 4 | 2.3 | 2.3 | |||
| 5–6 h | 48 | 27.1 | 29.4 | |||
| 6–7 h | 60 | 33.9 | 63.3 | |||
| 7–8 h | 45 | 25.4 | 88.7 | |||
| 8–9 h | 16 | 9.0 | 97.7 | |||
| 9–10 h | 2 | 1.1 | 98.9 | |||
| More than 10 h | 2 | 1.1 | 100.0 | |||
| (B) FREQUENCIES OF SLEEP OUTCOMES | ||||||
| How many days a week do you feel you have slept too little? | How many days a week do you feel tired during the day? | |||||
| Frequency | % | Cum. % | Frequency | % | Cum. % | |
| 0 | 29 | 16.4 | 16.4 | 26 | 14.7 | 14.7 |
| 1–2 days | 79 | 44.6 | 61.0 | 78 | 44.1 | 58.8 |
| 3–4 days | 46 | 26.0 | 87.0 | 45 | 25.4 | 84.2 |
| 5–6 days | 17 | 9.6 | 96.6 | 16 | 9.0 | 93.2 |
| 7 days | 6 | 3.4 | 100.0 | 12 | 6.8 | 100.0 |