Table 1.
Subjective and Polysomnographic Sleep Characteristics for Women Who Meet the Case Definition (Insomnia) and Women Who do not Meet the Case Definition (No Insomnia)
| No Insomnia N = 320 (89.4%) |
Insomnia N = 38 (10.6%) |
t-test | |
|---|---|---|---|
| PSQI global score | 6.4 ± 2.3 | 9.5 ± 3.2 | t = 16.6, df = 345,p < 0.001 |
| Diary Data | |||
| Sleep Onset Latency (minutes) | 14.6 ± 10.7 | 24.9 ± 18.6 | t = −3.4, df = 352,p = 0.002 |
| Wake after Sleep Onset (minutes) | 14.0 ± 13.8 | 24.5 ± 16.5 | t = −4.4, df = 352,p < 0.001 |
| Total Sleep Time (minutes) | 401.8 ± 47.9 | 379.1 ± 77.4 | t = 1.8, df = 352, p > 0.05 |
| Time in Bed (minutes) | 492.7 ± 70.1 | 518.1 ± 118.4 | t = −1.3, 352, p > 0.05 |
| Sleep Efficiency (%) | 93.2 ± 4.6 | 87.5 ± 7.2 | t = 4.7, df = 352, p < 0.001 |
| Polysomnography Data | |||
| AHI (events per hour) | 9.6 ± 13.4 | 16.6 ± 23.2 | t = −1.8, df = 356, p > 0.05 |
| Sleep Onset Latency (minutes) | 21.3 ± 20.1 | 24.6 ± 26.7 | t = −0.94, df = 356, p > 0.05 |
| Wake after Sleep Onset (minutes) | 52.0 ± 30.2 | 67.9 ± 43.2 | t = 8.5, df = 356, p = 0.03 |
| Total Sleep Time (minutes) | 376.0 ± 53.6 | 351.5 ± 69.8 | t = 3.6, df = 356, p < 0.05 |
| Time in Bed (minutes) | 449.0 ± 58.8 | 444.1 ± 65.0 | t = 0.50, df = 356, p > 0.05 |
| Sleep Efficiency (%) | 83.8 ± 7.7 | 79.1 ± 10.2 | t = 7.1, df = 356, p = 0.009 |