Table 1.
Participant demographics and menstrual phase allocation on constant routine and light exposure study days†
| Participant ID | Age | Bed time | DLMO | CBTmin | Menst cycle length | Constant routine menst. phase | Light exposure menst. phase |
|---|---|---|---|---|---|---|---|
| 22K7V | 19 | 23.97 | 23.12 | 5.70 | 30 | F | F |
| 26H6V* | 19 | 23.07 | 23.57 | 7.87 | 31.5 | F | L |
| 2614V | 22 | 24.00 | 23.49 | 5.63 | 28 | F | F |
| 26F2V | 22 | 24.07 | 24.12 | 5.10 | 33 | F | F |
| 25N6V | 23 | 22.67 | 20.87 | 2.10 | 28 | F | F |
| 2692V | 23 | 23.55 | 22.97 | 5.30 | 28 | F | F |
| 26G6V | 23 | 21.00 | 21.77 | 3.33 | 29 | F | F |
| 26G3V | 24 | 23.05 | 22.61 | 5.03 | 29 | F | F |
| 26R1V | 20 | 21.93 | 19.18 | 1.13 | 32.5 | L | L |
| 2622V | 22 | 22.68 | 21.10 | 4.13 | 27 | L | L |
| 2251V | 23 | 25.53 | 24.95 | 5.73 | 28 | L | L |
| 25Q2V | 23 | 23.00 | 23.23 | 3.53 | 27 | L | L |
| 22A1V | 24 | 22.02 | 21.93 | 4.60 | 29 | L | L |
| 22K3V* | 24 | 22.05 | — | 3.00 | 27 | L | F |
| 21B8V | 27 | 23.20 | 21.04 | 4.05 | 28 | L | L |
| 26P1V | 29 | 22.85 | 21.54 | 2.58 | 28 | L | L |
| Fol M (SD) | 21.88 (1.89) | 23.17 (1.02) | 22.81 (1.05) | 5.01 (1.71) | 29.56 (1.84) | n = 8 | n = 8 |
| Lut M (SD) | 24.00 (2.83) | 22.91 (1.17) | 21.85 (1.82) | 3.60 (1.39) | 28.31 (1.83) | n = 8 | n = 8 |
†CBTmin = core body temperature minimum; DLMO = dim light melatonin onset; menst. = menstrual; F = follicular phase; L = luteal phase. The mean ± SD of age, bedtime, DLMO, CBTmin, and menstrual cycle length for each menstrual phase is based on the menstrual phase classifications during CR. Allocation to the luteal phase was based on a cutoff of P4 > 3 ng/mL. The total number of participants (n) in each menstrual phase, follicular (Fol), and luteal (Lut) on different study days is presented in the bottom two rows. The participant IDs of women who changed menstrual phase during the study are marked with an asterisk (*).