Table 2.
Demographic characteristics of study participants and bivariate modified Poisson regression results; Life Influences on Fetal Environments Study (n = 686), 2009–2011.
| Term (n = 573) n (%) |
PTB (n = 113) n (%) |
RR | 95% CI | |
|---|---|---|---|---|
| Age | ||||
| 18–19 | 47 (8.5) | 9 (8.2) | 1.17 | 0.58, 2.37 |
| 20–24 | 191 (33.3) | 42 (37.2) | 1.31 | 0.83, 2.08 |
| 25–29 | 151 (26.3) | 24 (21.2) | referent | |
| 30–34 | 94 (16.4) | 21 (18.6) | 1.33 | 0.78, 2.28 |
| 35+ | 90 (15.7) | 17 (15.0) | 1.16 | 0.65, 2.05 |
| Marital status | ||||
| Single | 443 (77.3) | 82 (72.6) | referent | |
| Married | 126 (22.0) | 30 (26.6) | 1.23 | 0.84, 1.80 |
| Education (years) | ||||
| ≤12 | 186 (32.5) | 40 (35.4) | 1.12 | 0.78, 1.58 |
| >12 | 387 (67.5) | 73 (64.6) | referent | |
| Income | ||||
| <$35,000 | 303 (52.9) | 65 (57.5) | 1.14 | 0.79, 1.64 |
| ≥$35,000 | 207 (36.1) | 38 (33.6) | referent | |
| Time in neighborhood | ||||
| <24 months | 254 (44.3) | 50 (44.3) | 1.00 | 0.71, 1.41 |
| ≥24 months | 309 (53.9) | 61 (54.0) | referent | |
| Perceived Social Cohesion | ||||
| Low | 257 (47.2) | 52 (48.6) | 1.04 | 0.74, 1.48 |
| High | 287 (52.7) | 55 (51.4) | referent | |
| Perceived Food availability | ||||
| Low | 255 (45) | 56 (50) | 1.18 | 0.84, 1.66 |
| High | 312 (55) | 56 (50) | referent | |
| Perceived Walkability | ||||
| Low | 293 (42.5) | 50 (44.6) | 1.08 | 0.77, 1.51 |
| High | 324 (57.6) | 62 (55.4) | referent | |
| Perceived Safety | ||||
| Low | 244 (43.6) | 53 (48.2) | 1.17 | 0.83, 1.64 |
| High | 316 (56.4) | 57 (51.8) | referent | |
| Perceived Disorder | ||||
| Low | 261 (46.6) | 47 (42.7) | referent | |
| High | 299 (53.4) | 63 (57.3 | 1.14 | 0.81, 1.61 |
| Objective NDI | ||||
| Low | 292 (51) | 52 (46) | referent | |
| High | 281 (49) | 61 (54) | 1.18 | 0.84, 1.65 |
PTB: Preterm birth; NDI: Neighborhood disadvantage index; RR: Relative risk; 95% CI: 95% Confidence Interval; percentages do not sum to 100 due to missing values (range: 0–11%).