Table II.
Characteristics of 799 women and 487 men (447 couples) participating in the EARTH Study from 2004 to 2017.
| Characteristic | Women N = 799 | Men N = 487 |
|---|---|---|
| Age (years) | ||
| Mean (SD) | 34.7 (4.5) | 36.6 (5.4) |
| Age > 35, n (%) | 345 (43) | 273 (56) |
| Race, n (%) | ||
| White | 651 (81) | 419 (86) |
| Black | 39 (5) | 15 (3) |
| Asian | 71 (9) | 34 (7) |
| Other | 38 (5) | 19 (4) |
| BMI (kg/m2) | ||
| Mean (SD) | 24.6 (4.9) | 27.5 (4.5) |
| BMI > 25, n (%) | 283 (35) | 346 (71) |
| Education, n (%) | ||
| <College | 60 (8) | 55 (11) |
| College graduate | 231 (29) | 136 (28) |
| Graduate degree | 392 (49) | 198 (41) |
| Missing | 116 (14) | 98 (20) |
| Smoking status, n (%) | ||
| Never | 583 (73) | 327 (67) |
| Former | 192 (24) | 131 (27) |
| Current | 24 (3) | 29 (6) |
| Primary infertility diagnosis, n (%) | ||
| Male factor | 196 (24) | 146 (30) |
| Female factor | 285 (36) | 166 (34) |
| Diminished ovarian reserve | 90/285 | |
| Ovulation disorders | 106/285 | |
| Endometriosis | 36/285 | |
| Uterine disorders | 11/285 | |
| Tubal factor | 42/285 | |
| Unexplained | 318 (40) | 175 (36) |
| Nulliparous at study entry, n (%) | ||
| 698 (87) | – | |
| Live births, n (%) | ||
| Singletons, n (%) | 387/563 (69) | |
| Multiples, n (%) | 176/563 (31) | |