Table 2.
Objective and subjective sleep as assessed by polysomnography and morning sleep questionnaires in women in the menopause transition with and without insomnia.
| Women with insomnia (Mean ± SD, [95%CI]) |
Women without insomnia (Mean ± SD, [95%CI]) |
||
|---|---|---|---|
| Polysomnographic sleep | |||
| Sample (No.) | 38 | 34 | |
| Lights-out (hh:mm) | 23:11 ± 00:46 [22:56–23:26] | 22:54 ± 00:45 [22:39–23:09] | |
| Wake-up (hh:mm) | 06:21 ± 00:43 [06:07–06:35] | 06:24 ± 00:53 [06:07–06:35] | |
| TIB (min) | 428.1 ± 51.8 [411.0–445.1] | 452.1 ± 41.7 [437.6–466.7] | |
| TST (min) | 364.3 ± 37.4 [352.0–376.6] | 406.8 ± 37.2 [393.8–419.8] | ◄ |
| SE (%)c | 85.6 ± 7.5 [83.2–88.1] | 90.1 ± 4.7 [88.5–91.7] | ◄ |
| SOL (min) | 11.0 ± 8.9 [8.1–14.0] | 9.5 ± 8.5 [6.5–12.5] | |
| REML (min)a | 86.3 ± 34.2 [74.9–97.7] | 89.2 ± 26.7 [79.9–98.5] | |
| Arousal index (No/h) | 8.7 ± 3.3 [7.6–9.8] | 8.1 ± 3.0 [7.0–9.1] | |
| Awakening index (No/h) | 3.7 ± 1.4 [3.2–4.2] | 3.2 ± 1.2 [2.8–3.6] | |
| WASO (%)c | 11.9 ± 7.1 [9.6–14.2] | 7.8 ± 4.1 [6.4–9.2] | ◄ (†) |
| Time in N1 (%)c | 7.7 ± 3.5 [6.6–8.9] | 7.3 ± 2.9 [6.3–8.3] | |
| Time in N2 (%)c | 46.2 ± 6.7 [43.9–48.3] | 49.8 ± 6.6 [47.5–52.1] | |
| Time in N3 (%)c | 12.1 ± 6.8 [9.8–14.3] | 12.6 ± 4.5 [11.1–14.2] | |
| Time in REM (%)c | 19.5 ± 5.0 [17.9–21.1] | 20.5 ± 4.8 [18.8–22.1] | |
| Morning self-report sleep evaluation | |||
| TST (min)b | 371.8 ± 56.0 [352.8–390.7] | 414.2 ± 42.9 [399.0–429.4] | ◄ |
| SOL (min)b | 22.5 ± 29.9 [12.4–32.6] | 15.4 ± 13.7 [10.6–20.1] | |
| WASO (min)b | 32.6 ± 32.4 [21.8–43.4] | 21.8 ± 22.2 [13.9–29.6] | |
◄
significant Multiple Regression Models with group as a significant factor
(†)
significant Multiple Regression Models with luteal phase as a significant factor
a
one insomniac has been removed from the analysis (>3SD outside the mean)
b
one control and one insomniac did not complete the morning questionnaire
c
calculated as percentage of time spent in bed; TIB = Time in Bed; TST = Total Sleep Time; SE = Sleep Efficiency; SOL = Sleep Onset Latency; REM = Rapid Eye Movement (L, Latency); WASO = Wake After Sleep Onset