Table 1.
Baseline demographic and reproductive characteristics among 631 women in the EARTH Study.
| Count (%) | Antral Follicle Count (Mean ± SD) | |
|---|---|---|
| Demographic characteristics | ||
| Age, years | ||
| <32 | 127 (20.1) | 17.2 ± 7.0 |
| 32–35 | 202 (32.0) | 14.0 ± 6.5 |
| 36–39 | 197 (31.2) | 12.1 ± 6.0 |
| ≥40 | 105 (16.6) | 9.5 ± 5.5 |
| Race, n (%) | ||
| White | 527 (83.5) | 13.3 ± 6.7 |
| Other | 104 (16.5) | 13.4 ± 6.9 |
| Body Mass Index, kg/m2 | ||
| <18.5 | 12 (1.9) | 16.8 ± 7.1 |
| 18.5–24.9 | 400 (63.4) | 13.3 ± 6.7 |
| 25–29.9 | 146 (23.1) | 13.2 ± 6.7 |
| ≥30 | 73 (11.6) | 13.2 ± 7.1 |
| Smoking status, n (%) | ||
| Never smoked | 461 (73.1) | 13.5 ± 6.8 |
| Ever smoked | 170 (26.9) | 13.0 ± 6.7 |
| Education, n (%) | ||
| < College | 46 (7.3) | 14.5 ± 7.4 |
| College graduate | 268 (42.5) | 13.2 ± 6.7 |
| Graduate degree | 317 (50.2) | 13.2 ± 6.7 |
| State of residence, n (%) | ||
| Massachusetts | 607 (96.2) | 13.3 ± 6.7 |
| New Hampshire | 15 (2.4) | 13.1 ± 7.8 |
| Rhode Island | 8 (1.3) | 12.6 ± 6.8 |
| Maine | 1 (0.2) | - |
| Workplace heat exposure, n (%) | ||
| No | 614 (97.3) | 13.3 ± 6.8 |
| Yes | 17 (2.7) | 12.8 ± 6.0 |
| Reproductive characteristics | ||
| History of being pregnant, n (%) | ||
| No | 346 (54.8) | 13.8 ± 6.8 |
| Yes | 285 (45.2) | 12.7 ± 6.6 |
| Initial infertility diagnosisa, n (%) | ||
| Male factor | 163 (25.9) | 14.4 ± 6.5 |
| Female factor | 209 (33.2) | 11.8 ± 7.5 |
| DOR | 74 (11.8) | 6.9 ± 4.0 |
| Endometriosis | 35 (5.6) | 11.6 ± 6.4 |
| Ovulation Disorders | 57 (9.1) | 17.9 ± 8.2 |
| Tubal | 34 (5.4) | 12.5 ± 5.8 |
| Uterine | 9 (1.4) | 11.0 ± 4.6 |
| Unexplained | 256 (40.7) | 13.9 ± 6.1 |
| Antral follicle scan characteristics | ||
| Year of AFC | ||
| 2005–2007 | 104 (16.5) | 11.3 ± 5.6 |
| 2008–2010 | 234 (37.1) | 13.3 ± 6.8 |
| 2011–2013 | 175 (27.7) | 13.6 ± 6.6 |
| 2014–2015 | 118 (18.7) | 14.7 ± 7.5 |
| Month of AFC, n (%) | ||
| January | 64 (10.1) | 11.8 ± 6.9 |
| February | 63 (10.0) | 13.3 ± 7.1 |
| March | 46 (7.3) | 13.3 ± 5.8 |
| April | 53 (8.4) | 13.6 ± 6.5 |
| May | 52 (8.2) | 13.6 ± 7.5 |
| June | 45 (7.1) | 12.0 ± 5.6 |
| July | 34 (5.4) | 15.9 ± 7.7 |
| August | 43 (6.8) | 13.6 ± 7.4 |
| September | 48 (7.6) | 13.0 ± 6.2 |
| October | 59 (9.4) | 13.9 ± 6.9 |
| November | 75 (11.9) | 13.5 ± 6.7 |
| December | 49 (7.8) | 13.2 ± 6.5 |
Abbreviations: AFC, antral follicle count; DOR, diminished ovarian reserve.
a
3 women were missing infertility diagnoses