TABLE 4.
Changes in Behavior Over Pregnancy Attempt Time Among 250 Women Who Contributed 12 Months of Follow-up, Stratified by Gravidity and Agea
| Age <30 Years | Age ≥30 Years | |||||
|---|---|---|---|---|---|---|
| Total (n = 109) | Nulligravid (n = 83) | Gravid (n = 26) | Total (n = 141) | Nulligravid (n = 84) | Gravid (n = 57) | |
| Caffeine (mg/day) | −12 (−31, 8) | −9.3 (−29, 11) | −20 (−76, 36) | −25 (−43, −7.5) | −36 (−61, −10) | −8.9 (−32, 15) |
| Sugar-sweetened soda (drinks/week) | −0.39 (−0.90, 0.11) | −0.35 (−0.94, 0.24) | −0.56 (−1.6, 0.49) | 0.04 (−0.28, 0.36) | 0.01 (−0.24, 0.26) | 0.09 (−0.64, 0.83) |
| Alcohol (drinks/week) | −1.1 (−1.7, −0.50) | −0.96 (−1.6, −0.37) | −1.7 (−3.5, 0.22) | −0.66 (−1.3, −0.07) | −1.1 (−1.9, −0.27) | 0.04 (−0.77, 0.85) |
| Smoking (%) | 0.37 (−2.0, 2.8) | 1.2 (−1.2, 3.7) | −2.8 (−9.5, 4.0) | −0.74 (−2.2, 0.69) | −1.2 (−3.6, 1.2) | 0.00 (−) |
| Cigarettes/day | −0.26 (−3.6, 3.1) | 1.1 (−0.54, 2.7) | −1.6 (−11, 7.4) | −0.74 (−2.7, 1.2) | −0.18 (−0.90, 0.55) | −1.1 (−4.6, 2.5) |
| Marijuana use (%) | −5.5 (−11, 0.21) | −5.9 (−12, 0.41) | −4.0 (−18, 9.7) | −2.7 (−7.0, 1.6) | −3.9 (−10.4, 2.6) | −0.79 (−5.4, 3.8) |
| Vigorous exercise (hours/week) | −0.68 (−1.2, −0.14) | −0.73 (−1.4, −0.08) | −0.49 (−1.5, 0.52) | −0.68 (−1.2, −0.17) | −1.1 (−1.8, −0.50) | 0.04 (−0.83, 0.91) |
| Moderate exercise (hours/week) | 0.10 (−0.65, 0.85) | 0.09 (−0.76, 0.95) | 0.11 (−1.5, 1.8) | −0.52 (−1.2, 0.14) | −0.34 (−1.2, 0.53) | −0.82 (−1.9, 0.23) |
| Perceived stress scale score | −0.19 (−1.3, 0.95) | −0.14 (−1.4, 1.2) | −0.40 (−3.0, 2.2) | 0.07 (−0.88, 1.0) | 0.60 (−0.65, 1.9) | −0.77 (−2.2, 0.70) |
| Intercourse frequency (times/week) | −0.23 (−0.54, 0.07) | −0.20 (−0.56, 0.16) | −0.35 (−0.92, 0.23) | −0.17 (−0.43, 0.10) | −0.09 (−0.38, 0.20) | −0.29 (−0.80, 0.22) |
| Doing something to improve chances of pregnancy (%) | 31 (21, 42) | 25 (13, 37) | 53 (33, 74) | 15 (5.6, 24) | 14 (2.5, 25) | 16 (0.40, 32) |
| Daily multivitamin use (%) | 3.8 (−6.8, 14) | 7.3 (−4.4, 19) | −8.6 (−34, 17) | −1.5 (−10, 7.0) | 0.28 (−11, 11) | −4.4 (−19, 10) |
a
Uses inverse probability weights to adjust for loss to follow-up.