Table 1.
Time ratios (TR) and 95% confidence intervals (CI) for the association between descriptive characteristics and time-to-pregnancy using the current duration approach
| Characteristics | N | Weighted%a | Mean CDb | Unadjusted | Adjusted |
|---|---|---|---|---|---|
| TR (95% CI) | TR (95% CI) | ||||
| Total | 270 | - | 27.5 | - | - |
| Sociodemographic | |||||
| Age (y) | |||||
| 15–24 | 44 | 13.7 | 11.5 | 1.00 | 1.00 |
| 25–29 | 62 | 21.7 | 22.1 | 0.97 (0.38, 2.45) | 1.78 (1.03, 3.10) |
| 30–34 | 60 | 29.0 | 19.9 | 1.09 (0.49, 2.42) | 1.84 (1.10, 3.09) |
| 35–39 | 48 | 22.5 | 28.6 | 0.94 (0.34, 2.59) | 2.33 (1.36,3.99) |
| 40–44 | 32 | 13.1 | 69.7 | 1.38 (0.06, 34.3) | 4.07 (1.67,9.89) |
| Relationship status | |||||
| Married | 180 | 80.9 | 28.9 | 1.00 | 1.00 |
| Cohabiting | 35 | 11.7 | 26.6 | 1.47 (0.98, 2.20) | 0.98 (0.59, 1.61) |
| Not cohabiting | 31 | 7.4 | 15.2 | 0.60 (0.38, 0.95) | 0.58 (0.36, 0.91) |
| Race/ethnic identification | |||||
| Non-Hispanic white | 130 | 65.4 | 30.9 | 1.00 | 1.00 |
| Non-Hispanic black | 32 | 10.7 | 17.0 | 0.51 (0.32, 0.81) | 0.54 (0.28, 1.02) |
| Non-Hispanic other | 15 | 5.2 | 18.3 | 1.08 (0.53, 2.21) | 1.30 (0.81, 2.10) |
| Hispanic | 69 | 18.7 | 23.9 | 0.73 (0.51, 1.05) | 0.71 (0.47, 1.06) |
| Education (y) | |||||
| 0–11 | 60 | 17.9 | 27.0 | 1.00 | 1.00 |
| 12 | 60 | 22.8 | 26.8 | 0.93 (0.55, 1.59) | 0.73 (0.42, 1.28) |
| 13–15 | 51 | 23.5 | 44.7 | 1.27 (0.71, 2.26) | 0.83 (0.43, 1.60) |
| 16+ | 75 | 35.9 | 16.7 | 0.80 (0.45, 1.41) | 0.40 (0.21, 0.76) |
| Percent of poverty level | |||||
| ≥ 300 | 111 | 52.9 | 25.9 | 1.00 | 1.00 |
| 150–299 | 60 | 21.8 | 38.8 | 0.89 (0.56, 1.40) | 1.07 (0.70, 1.65) |
| < 150 | 75 | 25.3 | 21.6 | 0.76 (0.52, 1.10) | 0.76 (0.49, 1.19) |
| Health Insurance | |||||
| Any | 190 | 81.3 | 27.8 | 1.00 | 1.00 |
| None | 56 | 18.7 | 26.4 | 0.98 (0.65, 1.46) | 1.18 (0.72, 1.91) |
| Reproductive history | |||||
| Parity | |||||
| Parous | 127 | 49.9 | 21.9 | 1.00 | 1.00 |
| Nulliparous | 119 | 50.1 | 33.9 | 1.81 (1.27, 2.57) | 2.24 (1.59, 3.16) |
| Pelvic Inflammatory Disease | |||||
| Never treated | 231 | 94.0 | 27.2 | 1.00 | 1.00 |
| Ever treated | 15 | 6.0 | 32.6 | 1.59 (0.77, 3.31) | 1.46 (0.85, 2.52) |
| Gynecologic disordersc | |||||
| No | 150 | 54.9 | 24.6 | 1.00 | 1.00 |
| Yes | 96 | 45.1 | 31.9 | 1.44 (0.98, 2.11) | 1.55 (1.13, 2.13) |
a
Values are weighted percentages of each characteristic in the sample
b
Values are weighted means of reported current duration (CD) of pregnancy attempt in months used to estimate total duration of pregnancy attempt (time-to-pregnancy, TTP)
c
Ever received a diagnosis of ovarian cysts, fibroids, endometriosis, or ovulation/menstruation problems