Table 2.
Self-Reported Habitual Sleep Characteristicsa of the SJLIFE Sample (n=911)
| Sleep Characteristic | M (SD) |
|---|---|
| Sleep duration (hours) | 6.6 (1.4) |
| Sleep onset latency (minutes) | 35.0 (39.1) |
| Sleep efficiency (%) | 85.6 (19.7) |
| PSQI total score | 6.8 (2.9) |
|
N (%) |
|
| Short sleep duration (≤ 6 hours per evening) | 402 (44.1) |
| Long sleep duration (≥ 10 hours per evening) | 14 (1.5) |
| Typical sleep duration | 495 (54.3) |
| Short sleep duration + prolonged SOL | 192 (21.4) |
| Short sleep duration + WASO | 239 (26.6) |
| Short sleep duration + SE | 262 (29.2) |
| Poor sleep quality (PSQI > 5) | 503 (56.9) |
PSQI, Pittsburgh Sleep Quality Index; SOL, sleep onset latency; WASO, wake after sleep onset; SE, sleep efficiency
a
All variables from the Pittsburgh Sleep Quality Index