Table 3.
—Obstetric and Neonatal Outcomes
| Characteristic | Nonsmokers/No Household ETS Exposure (n = 972) | Nonsmokers/Household ETS Exposure (n = 760) | Smokers (n = 391) | P Valuea |
| Delivery < 37 wk | 153 (16) | 119 (16) | 74 (19) | NS |
| Delivery < 32 wk | 29 (3) | 25 (3) | 17 (4) | NS |
| Oligohydramnios | 62 (6) | 56 (7) | 18 (5) | NS |
| Abruption | 8 (0.8) | 12 (2) | 5 (1.3) | NS |
| Preeclampsia | 113 (12) | 102 (13) | 29 (7) | .01 |
| Perinatal death | 12 (1) | 6 (0.8) | 10 (3) | .04 |
| PROM | 110 (11) | 97 (13) | 59 (15) | NS |
| SGA < 10th percentile | 50 (5) | 54 (7) | 46 (12) | < .001 |
| Birthweight, mean ± SD | 3191 ± 692 | 3107 ± 665 | 2977 ± 712 | < .001 |
Data reported as n (%) unless otherwise stated. Obstetric and neonatal outcome data unavailable for 87 patients. NS = not significant; PROM = premature rupture of membranes; SGA = small for gestational age. See Table 1 for expansion of the other abbreviation.
a
Kruskal-Wallis and Pearson χ2 tests used to assess the hypothesis that there is no difference between the three smoking categories.