Table 4.
Variables (mean (SD)) derived from the polysomnograms of women with severe PMS and controls in the Follicular and Late-luteal phases of the menstrual cycle.
| Controls (N = 18) | Severe PMS (N = 18) | ||||
|---|---|---|---|---|---|
| Variable | Follicular phase | Late-luteal phase | Follicular phase | Late-luteal phase | ANOVA |
| Total recording time (min) | 459.1 (57.6) | 466.2 (48.4) | 453.8 (51.0) | 471.7 (44.9) | Group: ns Phase: ns Interaction: ns |
| Total sleep time (min) | 410.9 (58.3) | 419.1 (55.8) | 405.3 (53.0) | 423.7 (51.1) | Group: ns Phase: ns Interaction: ns |
| Sleep efficiency (%) | 89.5 (6.7) | 89.9 (7.0) | 89.2 (5.5) | 89.9 (7.3) | Group: ns Phase: ns Interaction: ns |
| Sleep onset latency (min) | 14.1 (15.4) | 19.8 (21.4) | 16.0 (12.2) | 18.9 (19.0) | Group: ns Phase: ns Interaction: ns |
| Wakefulness after sleep onset (min) | 34.0 (22.0) | 30.4 (21.9) | 32.5 (20.5) | 28.8 (19.7) | Group: ns Phase: ns Interaction: ns |
| Latency to REM sleep (min) | 78.7 (23.9) | 77.3 (19.5) | 96.7 (41.5) | 77.4 (20.9) | Group: ns Phase: ns Interaction: ns |
| Stage 1 (%)# | 6.5 (2.6) | 4.9 (2.4)* | 4.0 (1.5) | 4.2 (1.8) | Group: F (1,34) = 7.1, p = 0.01 Phase: ns Interaction: F (1,34) = 4.9, p = 0.03 |
| Stage 2 (%) | 58.1 (6.8) | 60.8 (4.4) | 57.9 (6.6) | 56.9 (5.0) | Group: ns Phase: ns Interaction: ns |
| Slow wave sleep (%)# | 13.4 (6.4) | 11.1 (4.7) | 16.1 (6.3) | 16.5 (5.2) | Group: F (1,34) = 6.2, p = 0.02 Phase: ns Interaction: ns |
| REM sleep (%) | 22.3 (3.5) | 23.2 (3.5) | 22.0 (5.1) | 22.4 (3.9) | Group: ns Phase: ns Interaction: ns |
| No. of Awakenings# | 21 (10) | 22 (12) | 16 (7) | 15 (5) | Group: F (1,34) = 4.6, p = 0.04 Phase: ns Interaction: ns |
| Arousal Index (No./h) | 6.9 (2.8) | 8.9 (3.9) | 7.4 (3.4) | 7.5 (2.4) | Group: ns Phase: F (1,34) = 4.1, ns (p = 0.051) Interaction: F (1,34) = 3.1, ns (p = 0.085) |
*
paired t-test, p = 0.02 compared with follicular phase;
#
significant group effect; No. = number