Table 3.
Sleep Variables Derived From the Polysomnograms of 9 Women with Severe PMS and 12 Asymptomatic Women (Control Subjects) in the Midfollicular and Late Luteal Phases of Their Menstrual Cycles.
| Variable | Group | Menstrual Cycle Phase |
|
|---|---|---|---|
| Follicular | Late Luteal | ||
| Total recording time, min | Control | 492.3 (43.6) | 496.5 (50.8) |
| PMS | 482.4 (39.4) | 493.6 (32.7) | |
| Total sleep time, min | Control | 469.2 (52.2) | 464.7 (53.8) |
| PMS | 434.9 (44.1) | 442.0 (43.6) | |
| Sleep efficiency, % | Control | 95.1 (4.5) | 94.4 (2.8) |
| PMS | 90.3 (6.7) | 89.8 (9.0) | |
| Sleep onset latency, min | Control | 13 (18) | 9 (9) |
| PMS | 23 (24) | 17 (17) | |
| Wakefulness after sleep onset, min | Control | 10 (4.0) | 17 (9)* |
| PMS | 23 (27) | 33 (42)* | |
| Latency to REM sleep, min | Control | 79 (18) | 80 (26) |
| PMS | 108 (52)# | 103 (29)# | |
| Stage 1, % | Control | 5.6 (2.6) | 6.9 (2.6) |
| PMS | 7.7 (3) | 7.1 (2.9) | |
| Stage 2, % | Control | 52.4 (5.3) | 55.2 (4.5) |
| PMS | 51.6 (6.7) | 53.2 (5.5) | |
| Slow-wave sleep, % | Control | 16.8 (3.5) | 14.9 (3.3) |
| PMS | 18.4 (4.2) | 18.1 (5.2) | |
| REM sleep, % | Control | 25.4 (3.5) | 23.0 (3.7) |
| PMS | 22.4 (5.6) | 21.6 (5.6) | |
| Arousal index, No./h sleep | Control | 6.5 (2) | 7.7 (3)* |
| PMS | 6.6 (1) | 6.9 (2)* | |
Data are expressed as mean (SD). REM refers to rapid eye movement sleep; PMS, premenstrual syndrome.
*
Significantly different from follicular phase (P < 0.05).
#
Significantly different from controls (P = 0.03).