Table 2.
PSQI Scores and Self-Reported Sleep Variables by Depressive Status
| Missing | All women | EPDS < 10 | EPDS ≥ 10 | Effect size** | |
|---|---|---|---|---|---|
| (n = 2830) | n = 2359 a | n = 466a | |||
| Mean (SD) | Mean (SD) | Mean (SD) | |||
| PSQI total (0-21) | 110 | 6.3 (3.1) | 5.7 (2.7) | 9.2 (3.1) | 1.2 |
| PSQI subscores (0-3): | |||||
| 1: Sleep quality | 8 | 1.0 (0.7) | 0.9 (0.6) | 1.6 (0.8) | 1.0 |
| 2: Sleep latency | 41 | 0.7 (0.9) | 0.6 (0.8) | 1.2 (1.0) | 0.7 |
| 3: Sleep duration | 18 | 1.1 (0.8) | 1.0 (0.8) | 1.5 (0.9) | -0.6 |
| 4: Habitual sleep efficiency | 29 | 1.6 (1.1) | 1.5 (1.1) | 2.0 (1.0) | 0.4 |
| 5: Sleep disturbances | 30 | 1.0 (0.5) | 0.9 (0.5) | 1.3 (0.6) | 0.9 |
| 6: Use of sleep medication | 6 | 0.03 (0.3) | 0.02 (0.2) | 0.11 (0.5) | 0.3 |
| 7: Daytime dysfunction | 20 | 1.0 (0.7) | 0.9 (0.6) | 1.7 (0.8) | 1.3 |
| Sleep variables, by PSQI | |||||
| Sleep onset latency, minutes | 30 | 19 (33) | 17 (31) | 26 (38) | 0.3 |
| Sleep at night, hours | 18 | 6.5 (1.3) | 6.6 (1.2) | 5.8 (1.3) | -0.6 |
| Sleep efficiency (%) | 29 | 73 (14) | 74 (14) | 68 (15) | -0.5 |
**
All P values < 0.001;
a
Five women had missing EPDS scores;
PSQI – Pittsburgh Sleep Quality Index; EPDS – Edinburgh Postnatal Depression Scale; SD – Standard deviation