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Table 3 Complications of pregnancy and pregnancy outcomes in women with (w/) and without (w/o) asthma by environmental tobacco smoke (p-values for interaction see Tables 2 and 4)

From: Environmental tobacco smoke exposure during pregnancy affects complications and birth outcomes in women with and without asthma

 w/o asthma (n = 1569)w/ asthma (n = 34)
ETSETS
ParameterCategoryNo (n = 1346)Yes (n = 223)No (n = 26)Yes (n = 8)
Gestational age at delivery (weeks)preterm (< 34)23 (1.7%)8 (3.6%)  
late preterm (34- < 37)74 (5.5%)16 (7.2%)  
early term (37- < 39)293 (21.8%)41 (18.4%)6 (23.1%)2 (25.0%)
full term (39- < 41)795 (59.1%)125 (56.1%)15 (57.7%)6 (75.0%)
late term (41+)161 (12.0%)33 (14.8%)5 (19.2%)0 (0.0%)
Cesarean sectionyes460 (34.2%)76 (34.1%)11 (42.3%)7 (87.5%)
Apgar 1 min7–101311 (97.4%)209 (93.7%)26 (100.0%)8 (100.0%)
< 735 (2.6%)14 (6.3%)  
Apgar 5 min7–101337 (99.3%)218 (97.8%)26 (100.0%)8 (100.0%)
< 79 (0.7%)5 (2.2%)  
Admittance of newbornyes86 (6.4%)24 (10.8%)3 (11.5%)1 (12.5%)
Anomalyyes5 (0.4%)2 (0.9%)1 (3.8%)0 (0.0%)
Any complicationyes566 (42.1%)121 (54.3%)14 (53.8%)3 (37.5%)
 Vaginal bleedingyes114 (8.5%)24 (10.8%)7 (26.9%)1 (12.5%)
 UTIyes124 (9.2%)27 (12.1%)2 (7.7%)2 (25.0%)
 Vomitingyes269 (20.0%)56 (25.1%)5 (19.2%)1 (12.5%)
 Cerclageyes11 (0.8%)1 (0.4%)  
 PEyes64 (4.8%)11 (4.9%)1 (3.8%)2 (25.0%)
 Pain ≥3 wk. bef. Deliveryyes42 (3.1%)12 (5.4%)1 (3.8%)0 (0.0%)
 PROMyes59 (4.4%)10 (4.5%)1 (3.8%)0 (0.0%)
 GDMyes22 (1.6%)8 (3.6%)2 (7.7%)1 (12.5%)
 Otheryes12 (0.9%)1 (0.4%)2 (7.7%)0 (0.0%)
Birth weight (g)mean ± SD3153 ± 4573108 ± 5073146 ± 4643333 ± 491