Table 3.
Odds ratios and 95% confidence intervals of preterm birth subtypes according to maternal exposure to serious life events during pregnancy, Lima, Peru, 2009–2010
| Life events | Controls (n=480)
|
Spontaneous preterm labor (n=245)
|
Preterm premature rupture of membranes (n=234)
|
||
|---|---|---|---|---|---|
| n | n | OR* (95% CI) | n | OR* (95% CI) | |
| Death of a first-degree relative/significant other | |||||
| No | 440 | 203 | 1.00 (referent) | 200 | 1.00 (referent) |
| Yes | 40 | 42 | 2.50 (1.55–4.04) | 34 | 1.73 (1.03–2.89) |
| Divorce or separation | |||||
| No | 465 | 229 | 1.00 (referent) | 217 | 1.00 (referent) |
| Yes | 15 | 16 | 2.25 (1.07–4.74) | 17 | 2.03 (0.97–4.26) |
| Fired or forced to change job | |||||
| No | 459 | 235 | 1.00 (referent) | 223 | 1.00 (referent) |
| Yes | 21 | 10 | 1.01 (0.46–2.23) | 11 | 1.13 (0.52–2.46) |
| Financial trouble or bankruptcy | |||||
| No | 433 | 190 | 1.00 (referent) | 173 | 1.00 (referent) |
| Yes | 47 | 55 | 2.58 (1.66–4.00) | 61 | 2.91 (1.87–4.51) |
| Serious fight or argument with partner | |||||
| No | 366 | 143 | 1.00 (referent) | 132 | 1.00 (referent) |
| Yes | 114 | 102 | 2.41 (1.71–3.40) | 102 | 2.41 (1.70–3.42) |
| Wedding of a close relative/friend | |||||
| No | 415 | 207 | 1.00 (referent) | 202 | 1.00 (referent) |
| Yes | 65 | 38 | 1.30 (0.83–2.03) | 32 | 1.03 (0.64–1.65) |
| Any of the serious life events | |||||
| No | 290 | 102 | 1.00 (referent) | 94 | 1.00 (referent) |
| Yes | 190 | 143 | 2.29 (1.65–3.18) | 140 | 2.19 (1.56–3.08) |
| 1 | 107 | 59 | 1.70 (1.13–2.53) | 57 | 1.61 (1.07–2.45) |
| 2 | 61 | 57 | 2.73 (1.76–4.26) | 59 | 2.89 (1.85–4.53) |
| 3+ | 22 | 27 | 4.26 (2.26–8.03) | 24 | 3.16 (1.63–6.14) |
| P for trend | <0.001 | <0.001 | |||
Note:
*
Adjusted for maternal age, prepregnancy weight, pregnancy not planned, and not receiving prenatal care.
Abbreviations: CI, confidence interval; OR, odds ratio.