Untoward Outcomes of 2,673 Pregnancies as Function of Other Risk Factors at Time of Pregnancy
| % of live births (n = 2,009) with: | ||||||||
|---|---|---|---|---|---|---|---|---|
| Factor (overall population) | No. of pregnancies | Induced abortions (%) | Miscarriages (%) | Stillbirths (%) | Term of <37 wk | Low birth weight | Death at <1 y | Malformation |
| Age (y) at conception | ||||||||
| <35 | 2,320 | 11 | 9 | 1.6 | 6.8 | 8 | 0.9 | 3.4 |
| >35 | 353 | 27.5* | 19* | 2.1 | 5.4 | 6 | 1.4 | 1.7 |
| Smoking habit | ||||||||
| No | 2,319 | 10.1 | 10.5 | 1.6 | 6.6 | 7.8 | 1 | 3.5 |
| Yes | 309 | 25.6* | 11 | 1.5 | 5.5 | 8.1 | 0.7 | 1.3* |
| Missing | 45 | |||||||
| Alcohol intake | ||||||||
| No | 2,372 | 10.8 | 10.5 | 1.7 | 6.8 | 7.8 | 0.9 | 3.5 |
| Yes | 253 | 21.7* | 12.3 | 1.2 | 4 | 8.3 | 1.2 | 0.8* |
| Missing | 48 | |||||||
| Socioeconomic status | ||||||||
| Not low | 1,750 | 12.6 | 11.1 | 1.7 | 5.5 | 7 | 1 | 3.4 |
| Low | 354 | 9.9 | 10.9 | 2 | 4.7 | 10.9* | 1.3 | 3.9 |
| Missing | 569 | |||||||
↵* P < 0.05, as determined by χ2 test for heterogeneity.
Induced abortions include both therapeutic and elective.