Table 1.
Demographic characteristics of 265 EARTH study women according to quintile of PI.
| Total Protein Intake | ||||||
|---|---|---|---|---|---|---|
| Q1 | Q2 | Q3 | Q4 | Q5 | P-value1 | |
| N | 53 | 53 | 53 | 53 | 53 | |
| Median, % energy | 13.6 | 15.3 | 16.4 | 17.9 | 20.9 | |
| Range, % energy | 10.35,14.44 | 14.48,15.96 | 15.98,17.02 | 17.03,18.73 | 18.76,26.14 | |
| Mean ± SD or N (%) | ||||||
| Demographics | ||||||
| Age, years | 34.8±4.1 | 35.2±3.7 | 35.6±4.4 | 34.3±3.7 | 35.0±3.7 | 0.53 |
| BMI, kg/m2 | 23.9±3.9 | 24.0±3.8 | 23.2±3.4 | 25.3±6.2 | 25.3±5.0 | 0.26 |
| Ever smokers, N (%) | 14 (26) | 17 (32) | 8 (15) | 20 (38) | 16 (30) | 0.11 |
| M-V Exercise, hrs/week2 | 3.5±3.7 | 3.4±3.8 | 4.0±4.7 | 3.8±4.1 | 4.9±6.1 | 0.96 |
| White | 45 (85) | 46 (87) | 44 (83) | 45 (85) | 46 (87) | 0.98 |
| Diet | ||||||
| Alcohol, g/d | 6.5±7.3 | 9.1±9.3 | 7.6±10.4 | 9.4±10.6 | 6.0±5.8 | 0.21 |
| Caffeine, g/d | 116±100 | 119±88 | 112±122 | 133±115 | 120±144 | 0.48 |
| Total fat, % energy | 32.4±6.6 | 32.6±5.9 | 32.3±7.1 | 32.6±5.7 | 33.5±5.6 | 0.55 |
| Total carbohydrate, % energy | 54.5±7.4 | 51.0±6.4 | 50.4±7.2 | 48.0±6.9 | 44.6±6.3 | <.0001 |
| Total energy intake, kcal/d | 1840±586 | 1904±627 | 1777±632 | 1778±577 | 1627±564 | 0.15 |
| Reproductive history, N (%) | ||||||
| Prior pregnancy | 26 (49) | 19 (36) | 19 (36) | 18 (34) | 22 (42) | 0.51 |
| Day 3 FSH, IU/ml | 7.2±2.0 | 7.5±3.2 | 7.8±2.8 | 7.4±1.8 | 7.3±2.5 | 0.82 |
| Infertility diagnosis, N (%) | 0.16 | |||||
| Male factor | 11 (21) | 14 (26) | 14 (26) | 22 (42) | 13 (25) | |
| Diminished ovarian reserve | 3 (6) | 4 (8) | 7 (13) | 2 (4) | 2 (4) | |
| Ovulatory | 8 (15) | 7 (13) | 3 (6) | 1 (2) | 4 (8) | |
| Endometriosis, uterine, tubal | 3 (6) | 5 (9) | 4 (8) | 6 (11) | 9 (17) | |
| Unexplained | 28 (53) | 23 (43) | 25 (47) | 22 (42) | 25(47) | |
1
Kruskal–Wallis & x2-test: for continuous and categorical variables, respectively;
2
Moderate-Vigorous Exercise.