Impact of maternal reproductive history on the risk of injury related infant death
| Homicide | Unintentional injury | ||||||
|---|---|---|---|---|---|---|---|
| Risk factor | No of births | No of deaths | Unadjusted OR (95% CI) | Adjusted OR (95% CI)* | No of deaths | Unadjusted OR (95% CI) | Adjusted OR (95% CI)* |
| CI = confidence interval; OR = odds ratio. | |||||||
| *Adjusted odds ratios obtained from logistic regression models for homicide/unintentional injury including race, birth weight, alcohol intake, cigarette smoking, prenatal care, marital status, maternal age, maternal education, paternal education, birth order, and interpregnancy interval. | |||||||
| Total | 10 671 666 | 821 | 2397 | ||||
| Birth order | |||||||
| 2nd–3rd child | 5 117 315 | 375 | 1.0 | 1.0 | 1264 | 1.0 | 1.0 |
| 1st child | 4 389 961 | 317 | 1.0 (0.8 to 1.1) | 1.1 (0.9 to 1.3) | 667 | 0.6 (0.6 to 0.7) | 0.6 (0.5 to 0.6) |
| >3rd child | 1 120 669 | 115 | 1.2 (1.0 to 1.5) | 0.9 (0.7 to 1.1) | 453 | 1.7 (1.5 to 1.8) | 1.4 (1.2 to 1.5) |
| Missing | 43 721 | 14 | 3.4 (2.0 to 6.0) | 2.0 (1.1 to 3.8) | 13 | 0.7 (0.4 to 1.3) | 0.7 (0.4 to 1.3) |
| Interpregnancy interval | |||||||
| >12 months | 8 993 937 | 544 | 1.0 | 1.0 | 1670 | 1.0 | 1.0 |
| <6 months | 453 804 | 125 | 4.6 (3.8 to 5.5) | 3.0 (2.4 to 3.8) | 292 | 3.5 (3.1 to 3.9) | 1.7 (1.5 to 2.0) |
| 6–12 months | 798 665 | 91 | 1.9 (1.5 to 2.4) | 1.7 (1.3 to 2.2) | 315 | 2.1 (1.9 to 2.4) | 1.4 (1.2 to 1.6) |
| Missing | 425 260 | 61 | 2.4 (1.8 to 3.1) | 1.4 (1.0 to 2.0) | 120 | 1.5 (1.3 to 1.8) | 1.0 (0.8 to 1.2) |