Table 4.
Subgroup analysis in participants with and without concerns regarding dislodgement of sanitary products from underwear.
| M1 | M2 | MF | P for Interaction | ||
|---|---|---|---|---|---|
| TIB, min | Yes (n = 13) | 406.9 ± 69.5 | 366.9 ± 67.1 | 380.0 ± 93.1 | .307 |
| No (n = 32) | 394.7 ± 59.7 | 364.1 ± 74.1 | 405.6 ± 64.9 | ||
| TST, min | Yes (n = 13) | 371.2 ± 58.1 | 331.3 ± 63.9 | 357.5 ± 85.2 | .333 |
| No (n = 32) | 351.2 ± 63.5 | 331.4 ± 72.9 | 373.6 ± 62.8 | ||
| SOL, min | Yes (n = 13) | 11.5 (19.5) | 12.5 (17.3) | 8.5 (10.4) | .872 |
| No (n = 32) | 15.0 (21.0) | 16.5 (14.3) | 12.8 (14.8) | ||
| SE, % | Yes (n = 13) | 91.6 ± 6.0 | 90.8 ± 9.1 | 94.4 ± 4.4 | .555 |
| No (n = 32) | 89.0 ± 8.6 | 90.9 ± 5.4 | 92.6 ± 5.6 | ||
| WASO, min | Yes (n = 13) | 9.5 (13.5) | 9.5 (10.3) | 5.5 (8.1) | .534 |
| No (n = 32) | 8.8 (11.5) | 8.8 (13.0) | 7.0 (9.0) | ||
| % of REM sleep, % | Yes (n = 13) | 27.6 ± 6.5 | 25.7 ± 5.9 | 27.2 ± 4.5 | .799 |
| No (n = 32) | 26.4 ± 6.7 | 25.7 ± 6.0 | 27.3 ± 4.1 | ||
| % of N3 sleep, % | Yes (n = 13)* | 21.7 ± 8.7 | 26.4 ± 7.7 | 26.9 ± 8.1 | .038 |
| No (n = 32) | 25.2 ± 9.2 | 23.8 ± 8.3 | 23.6 ± 5.6 | ||
| Ar I, events/h of sleep | Yes (n = 13) | 8.3 ± 3.2 | 7.7 ± 2.7 | 6.9 ± 1.7 | .231 |
| No (n = 32) | 7.0 ± 2.5 | 6.3 ± 2.4 | 6.6 ± 2.6 |
Continuous data are summarized using the mean ± standard deviation or median (interquartile range). *P < 0.05 for analysis of variance within subgroups. ArI = arousal index, M1/2 = first and second night after menses onset, MF = midfollicular phase; N3 = deep non-REM sleep, REM = rapid eye movement, SE = sleep efficiency, SOL = sleep onset latency, TST = total sleep time, WASO = wake after sleep onset.