Table 2.
Odds ratios and 95% confidence intervals of preterm birth according to maternal exposure to serious life events during pregnancy, Lima, Peru, 2009–2010
| Life events | Controls (n=480)
|
All PTB (n=479)
|
Unadjusted OR (95% CI) | Adjusted OR* (95% CI) | ||
|---|---|---|---|---|---|---|
| n | % | n | % | |||
| Death of a first-degree relative/significant other | ||||||
| No | 440 | 91.7 | 403 | 84.1 | 1.00 (referent) | 1.00 (referent) |
| Yes | 40 | 8.3 | 76 | 15.9 | 2.07 (1.38–3.11) | 2.10 (1.38–3.20) |
| Divorce or separation | ||||||
| No | 465 | 96.9 | 446 | 93.1 | 1.00 (referent) | 1.00 (referent) |
| Yes | 15 | 3.1 | 33 | 6.9 | 2.29 (1.23–4.28) | 2.09 (1.10–4.00) |
| Fired or forced to change job | ||||||
| No | 459 | 95.6 | 458 | 95.6 | 1.00 (referent) | 1.00 (referent) |
| Yes | 21 | 4.4 | 21 | 4.4 | 1.00 (0.54–1.86) | 1.08 (0.57–2.03) |
| Financial trouble or bankruptcy | ||||||
| No | 433 | 90.2 | 363 | 75.8 | 1.00 (referent) | 1.00 (referent) |
| Yes | 47 | 9.8 | 116 | 24.2 | 2.94 (2.04–4.25) | 2.70 (1.85–3.94) |
| Serious fight or argument with partner | ||||||
| No | 366 | 76.3 | 275 | 57.4 | 1.00 (referent) | 1.00 (referent) |
| Yes | 114 | 23.8 | 204 | 42.6 | 2.38 (1.81–3.14) | 2.40 (1.78–3.17) |
| Wedding of a close relative/friend | ||||||
| No | 415 | 86.5 | 409 | 85.4 | 1.00 (referent) | 1.00 (referent) |
| Yes | 65 | 13.5 | 70 | 14.6 | 1.09 (0.76–1.57) | 1.56 (0.80–1.68) |
| Any serious life event | ||||||
| No | 290 | 60.4 | 196 | 40.9 | 1.00 (referent) | 1.00 (referent) |
| Yes | 190 | 39.6 | 283 | 59.1 | 2.20 (1.70–2.85) | 2.21 (1.69–2.90) |
| 1 | 107 | 22.3 | 116 | 24.2 | 1.60 (1.17–2.21) | 1.64 (1.18–2.28) |
| 2 | 61 | 12.7 | 116 | 24.2 | 2.81 (1.97–4.03) | 2.75 (1.90–4.00) |
| 3+ | 22 | 4.6 | 51 | 10.6 | 3.43 (2.02–5.84) | 3.62 (2.08–6.29) |
| P for trend | <0.001 | <0.001 | ||||
Note:
*
Adjusted for maternal age, prepregnancy weight, pregnancy not planned, and not receiving prenatal care.
Abbreviations: PTB, preterm birth; OR, odds ratio.