Table 1.
Study participant characteristics stratified by AMH categories (N = 2079 cycles, 650 women)
| No. of womena | ≤1.6 N cycles (%) | >1.6 to 3.4 N cycles (%) | >3.4 to 8 N cycles (%) | >8 N cycles (%) | |
|---|---|---|---|---|---|
| 650 | 602 (28.9) | 658 (31.6) | 620 (29.7) | 205 (9.8) | |
| Menstrual cycle length | |||||
| Short (19-25) | 82 (12.5) | 170 (28.2) | 121 (18.4) | 50 (8.1) | 14 (6.8) |
| Normal (26-34) | 462 (70.6) | 402 (66.8) | 476 (72.3) | 471 (76.0) | 121 (59.0) |
| Long (35-68) | 106 (16.2) | 30 (5.0) | 59 (9.0) | 95 (15.3) | 70 (34.1) |
| Missing | 4 (0.6) | 0 (0.0) | 2 (0.3) | 4 (0.6) | 0 (0.0) |
| Age (y) | |||||
| <35 | 448 (68.5) | 282 (46.8) | 426 (64.7) | 470 (75.8) | 169 (82.4) |
| 35-37 | 127 (19.4) | 144 (23.9) | 141 (21.4) | 104 (16.8) | 30 (14.6) |
| >37 | 78 (11.9) | 176 (29.2) | 90 (13.7) | 46 (7.4) | 6 (2.9) |
| Missing | 1 (0.2) | 0 (0.0) | 1 (0.2) | 0 (0.0) | 0 (0.0) |
| Race | |||||
| White | 504 (77.1) | 472 (78.4) | 459 (69.8) | 470 (75.8) | 161 (78.5) |
| Black | 61 (9.3) | 65 (10.8) | 94 (14.3) | 69 (11.1) | 12 (5.9) |
| Otherb | 89 (13.6) | 65 (10.8) | 105 (16.0) | 81 (13.1) | 32 (15.6) |
| Education | |||||
| ≤HS or some college | 53 (8.1) | 42 (7.0) | 67 (10.2) | 57 (9.2) | 19 (9.3) |
| 4-year degree | 195 (29.8) | 201 (33.4) | 211 (32.1) | 170 (27.4) | 65 (31.7) |
| Graduate degree | 406 (62.1) | 359 (59.6) | 380 (57.8) | 393 (63.4) | 121 (59.0) |
| Body mass index (kg/m 2 ) at baseline | |||||
| <18.5 | 20 (3.1) | 4 (0.7) | 28 (4.3) | 23 (3.7) | 1 (0.5) |
| 18.5-24.9 | 398 (60.9) | 353 (58.6) | 381 (57.9) | 377 (60.8) | 121 (59.0) |
| 25 - 30 | 130 (19.9) | 121 (20.1) | 108 (16.4) | 144 (23.2) | 55 (26.8) |
| ≥30 | 105 (16.1) | 123 (20.4) | 141 (21.4) | 76 (12.3) | 28 (13.7) |
| Missing | 1 (0.2) | 1 (0.2) | 0 (0.0) | 0 (0.0) | 0 (0.0) |
| Time since oral contraceptive use | |||||
| >3 months | 534 (81.7) | 542 (90.0) | 587 (89.2) | 550 (88.7) | 186 (90.7) |
| 1 month or less | 67 (10.2) | 23 (3.8) | 22 (3.3) | 30 (4.8) | 5 (2.4) |
| 2 months | 22 (3.4) | 12 (2.0) | 16 (2.4) | 12 (1.9) | 3 (1.5) |
| 3 months | 31 (4.7) | 25 (4.2) | 33 (5.0) | 28 (4.5) | 11 (5.4) |
| Mean alcoholic drinks per week at baseline | |||||
| None | 226 (34.6) | 192 (31.9) | 246 (37.4) | 201 (32.4) | 75 (36.6) |
| ≤7 | 368 (56.3) | 350 (58.1) | 356 (54.1) | 360 (58.1) | 105 (51.2) |
| >7 | 58 (8.9) | 56 (9.3) | 53 (8.1) | 59 (9.5) | 25 (12.2) |
| Missing | 2 (0.3) | 4 (0.7) | 3 (0.5) | 0 (0.0) | 0 (0.0) |
| Smoking history | |||||
| Never | 500 (76.5) | 439 (72.9) | 525 (79.8) | 471 (76.0) | 160 (78.0) |
| Current | 11 (1.7) | 24 (4.0) | 4 (0.6) | 4 (0.6) | 1 (0.5) |
| Past | 143 (21.9) | 139 (23.1) | 129 (19.6) | 145 (23.4) | 44 (21.5) |
| Mean caffeinated drinks per day at baseline | |||||
| ≤0.5 | 138 (21.1) | 111 (18.4) | 141 (21.4) | 135 (21.8) | 50 (24.4) |
| >0.5-<2 | 233 (35.6) | 211 (35.0) | 260 (39.5) | 205 (33.1) | 79 (38.9) |
| 2-<3 | 189 (28.9) | 188 (31.2) | 164 (24.9) | 187 (30.2) | 48 (23.4) |
| ≥3 | 94 (14.4) | 92 (15.3) | 93 (14.1) | 93 (15.0) | 28 (13.7) |
a In the “No. of women” column, each woman is categorized by her mean menstrual cycle length during the study.
b “Other” included American Indian/Alaska Native, Asian/Pacific Islander, Hispanic, and mixed or unknown race.