Table 4.

Prenatal and Maternal Risk Factors for SIDS

Risk FactorSIDS
N (%)
Controls N (%)OR95% CI
Birth weight <2500 g44 (18.1)23 (2.7)9.35.1 –17
Preterm birth45 (18.8)32 (3.8)5.73.5 –9.4
IUGR*41 (20.6)60 (7.2)3.12.0 –4.9
Preeclampsia16 (6.6)25 (2.9)2.71.3 –5.3
Hypertension29 (11.9)83 (9.6)1.30.86 –2.1
Urinary tract infection24 (9.8)58 (6.7)1.60.96 –2.6
Illness first week of life64 (26.3)171 (19.8)1.41.0 –2.0
Smoking in pregnancy150 (61.7)253 (29.4)4.13.0 –5.7
Maternal age <25 y70 (28.7)149 (17.1)2.11.5 –2.9
Second or higher birth order189 (77.5)518 (59.8)2.31.6 –3.1
Education <10 y78 (32.4)114 (13.3)3.32.2 –4.5
Mother single at birth26 (10.7)33 (3.8)2.91.7 –5.0
  • * Infants delivered at term with birth weight <10th percentile (2967 g).