Table 1.
Demographic and psychosocial factors of the Life-course Influences on Fetal Environments study participants (2009–2011)
| Total sample (n = 681) N (%) |
Term delivery (n = 570) N (%) |
Preterm (n = 111) N (%) |
RR | 95% CI | |
|---|---|---|---|---|---|
| Age | |||||
| 18–19 | 56 (8.22) | 45 (7.89) | 11 (9.91) | 1.26 | 0.68, 2.36 |
| 20–24 | 206 (30.25) | 171 (30.00) | 35 (31.53) | 1.09 | 0.70, 1.71 |
| 25–29 | 193 (28.34) | 163 (28.60) | 30 (27.03) | Referent | |
| 30–34 | 128 (18.80) | 110 (19.30) | 18 (16.22) | 0.90 | 0.53, 1.55 |
| 35+ | 98 (14.39) | 81 (14.21) | 17 (15.32) | 1.10 | 0.64, 1.90 |
| Married | |||||
| No | 490 (72.8) | 409 (72.65) | 81 (73.64) | Referent | |
| Yes | 183 (27.19) | 154 (27.35) | 29 (26.36) | 0.96 | 0.65, 1.41 |
| Education (years) | |||||
| ≤ 12 | 183 (26.87) | 155 (27.19) | 28 (25.23) | Referent | |
| > 12 | 498 (73.13) | 415 (72.81) | 83 (74.77) | 1.09 | 0.74, 1.61 |
| Income | |||||
| Under $35,000 | 299 (47.31) | 254 (48.02) | 45 (43.69) | 1.16 | 0.81, 1.65 |
| $35,000 or more | 333 (52.69) | 275 (51.98) | 58 (56.31) | Referent | |
| Depressive symptoms (median split) | |||||
| < 9 | 300 (47.39) | 253 (47.56) | 47 (46.53) | Referent | |
| ≥ 9 | 333 (52.61) | 279 (52.44) | 54 (53.47) | 1.04 | 0.72, 1.48 |