Table 1.
Baseline characteristics of 273 women in Environment and Reproductive Health (EARTH) Study by quintile of moderate-to-vigorous and sedentary activity.
| Total cohort | Moderate-to-vigorous activity | Sedentary activity | |||
|---|---|---|---|---|---|
| Quintile (range of activity, h/week) | – | Q1 (<0.7) | Q5 (≥7.2) | Q1 (<29) | Q5 (≥66) |
| N | 273 | 54 | 54 | 53 | 55 |
| Age, years | 35.3 (3.9) | 35.5 (4.5) | 35.4 (3.7) | 35.1 (4.4) | 35.6 (3.6) |
| BMI, kg/m2 | 24.0 (4.2) | 24.6 (4.3) | 24.0 (4.7) | 23.9 (4.7) | 24.4 (4.5) |
| Ever smoker, n (%) | 78 (28.7) | 16 (29.6) | 16 (29.6) | 15 (28.3) | 15 (27.3) |
| White/Caucasian, n (%) | 224 (82.1) | 43 (79.6) | 47 (87.0) | 39 (73.6) | 46 (83.6) |
| Education level, n (%) | |||||
| Less than college | 24 (8.8) | 5 (9.3) | 8 (14.8) | 9 (17.0) | 4 (7.3) |
| College degree | 89 (32.6) | 17 (31.5) | 17 (31.5) | 18 (34.0) | 19 (34.5) |
| Graduate degree | 160 (58.6) | 32 (59.3) | 29 (53.7) | 26 (49.1) | 32 (58.2) |
| Currently employed, n (%) | 262 (96.0) | 50 (92.6) | 53 (98.1) | 48 (90.6) | 53 (96.4) |
| Moderate-to-vigorous activity, h/week | 4.3 (4.6) | 0.2 (0.3) | 11.9 (4.4)a | 3.8 (4.7) | 4.7 (4.6) |
| Sedentary activity, h/week | 48.6 (21.7) | 43.3 (22.6) | 49.7 (18.6) | 16.9 (7.2) | 78.8 (11.6)a |
| Self-perceived stressb | 5.7 (3.1) | 5.5 (3.5) | 5.8 (3.2) | 5.6 (3.0) | 6.1 (3.4) |
| Infertility diagnosis, n (%) | |||||
| Female factor | 86 (31.5) | 18 (33.3) | 21 (38.9)a | 19 (35.8) | 17 (30.9) |
| Ovulation disorders | 23 (8.4) | 2 (3.7) | 7 (13.0) | 4 (7.5) | 4 (7.3) |
| Diminished ovarian reserve | 25 (9.2) | 6 (11.1) | 9 (16.7) | 4 (7.5) | 5 (9.1) |
| Tubal | 20 (7.3) | 5 (9.3) | 2 (3.7) | 8 (15.1) | 4 (7.3) |
| Endometriosis | 16 (5.9) | 5 (9.3) | 2 (3.7) | 2 (3.8) | 4 (7.3) |
| Uterine | 3 (1.1) | 0 (0.0) | 1 (1.9) | 1 (1.9) | 0 (0.0) |
| Male factor | 92 (33.7) | 21 (38.9) | 16 (29.6) | 18 (34.0) | 17 (30.9) |
| Unexplained | 94 (34.4) | 15 (27.8) | 17 (31.5) | 16 (30.2) | 21 (38.2) |
| Treatment protocol, n (%) | |||||
| Antagonist | 21 (7.7) | 6 (11.1) | 4 (7.4) | 4 (7.5) | 5 (9.1) |
| Flare | 35 (12.9) | 9 (16.7) | 6 (11.1) | 5 (9.4) | 5 (9.1) |
| Luteal phase agonist | 216 (79.4) | 39 (72.2) | 44 (81.5) | 44 (83.0) | 45 (81.8) |
| Day 3 FSH, IU/Lc | 7.1 (2.1) | 7.1 (2.0) | 7.2 (2.4) | 7.4 (2.2) | 7.0 (2.0) |
| Embryo transfer day, n (%) | |||||
| No embryos transferred | 25 (9.2) | 3 (5.6) | 8 (14.8) | 6 (11.3) | 5 (9.1) |
| Day 2 | 14 (5.1) | 3 (5.6) | 3 (5.6) | 1 (1.9) | 1 (1.8) |
| Day 3 | 127 (46.5) | 28 (51.9) | 25 (46.3) | 25 (47.2) | 26 (47.3) |
| Day 5 | 89 (32.6) | 14 (25.9) | 15 (27.8) | 18 (34.0) | 18 (32.7) |
| Egg donor or cryo cycle | 18 (6.6) | 6 (11.1) | 3 (5.6) | 3 (5.7) | 5 (9.1) |
| Number of embryos transferred, n (%) | |||||
| No embryos transferred | 25 (9.2) | 3 (5.6) | 8 (14.8) | 6 (11.3) | 5 (9.1) |
| 1 embryo | 34 (12.5) | 7 (13.0) | 8 (14.8) | 6 (11.3) | 5 (9.1) |
| 2 embryos | 157 (57.5) | 27 (50.0) | 28 (51.9) | 30 (56.6) | 30 (54.5) |
| 3+ embryos | 39 (14.3) | 11 (20.4) | 7 (13.0) | 8 (15.1) | 10 (18.2) |
| Egg donor or cryo cycle | 18 (6.6) | 6 (11.1) | 3 (5.6) | 3 (5.7) | 5 (9.1) |
Data are presented as mean (standard deviation) unless otherwise noted.
a
P < 0.05 across all quintiles.
b
Assessed on a scale from zero (least stressed) to 16 (most stressed).
c
Data are missing for 38 women (35 missing by design: cryo cycles, donor egg cycles and early cancellations).