TABLE 2

Stratified and Pooled Multivariable ORs (95% CIs) of SIDS for Duration of Any Breastfeeding

Duration, moNZCDSGeSIDCIMSScottishECASCESDISWISSIrishPooled Model 1a (n = 3386)Pooled Model 2b (n = 5008)Pooled Model 3c (n = 6121)Pooled Model 4d (n = 7842)
Never1.001.001.001.001.001.001.001.001.001.001.001.00
>0–20.86 (0.53–1.40)0.89 (0.49–1.63)0.69 (0.36–1.31)0.69 (0.31–1.52)0.79 (0.25–2.51)0.96 (0.65–1.40)0.12 (0.01–2.18)1.13 (0.59–2.17)0.91 (0.68–1.21)0.90 (0.72–1.12)0.83 (0.69–1.01)0.83 (0.70–0.99)
>2–40.67 (0.40–1.11)0.51 (0.29–0.88)0.16 (0.04–0.71)0.38 (0.09–1.54)0.82 (0.25–2.73)0.78 (0.45–1.34)0.02 (<0.001–0.93)0.19 (0.07–0.51)0.60 (0.44–0.82)0.62 (0.48–0.80)0.52 (0.41–0.65)0.46 (0.37–0.56)
>4–60.39 (0.19–0.80)0.37 (0.18–0.74)0.16 (0.01–1.72)0.20 (0.03–1.57)0.94 (0.23–3.94)0.64 (0.24–1.75)<0.001 (<0.001–3.50)0.08 (0.01–0.86)0.40 (0.26–0.63)0.42 (0.29–0.61)0.38 (0.27–0.54)0.40 (0.30–0.53)
>60.44 (0.17–1.13)0.30 (0.15–0.63)UndefinedUndefined0.06 (0.00–0.94)0.26 (0.05–1.25)0.001 (<0.001–1.71)0.45 (0.06–3.09)0.36 (0.22–0.61)0.34 (0.22–0.54)0.33 (0.21–0.50)0.25 (0.17–0.37)
  • a Model 1 controlled for sleep position at last sleep, maternal smoking during pregnancy, bed-sharing in the last sleep (infant sleeping with another person on the same surface), room-sharing in the last sleep (infant sleeping in the same room as an adult caregiver but on a separate surface), dummy or pacifier in the last sleep, maternal age, prenatal care, marital status, parity, maternal education, SES, infant age, infant sex, admission to a special care infant unit, season at death, birth weight, gestational age, multiple pregnancy, and cesarean delivery.

  • b Model 2 controlled for variables in model 1, except for cesarean delivery, to include the CESDI and SWISS studies.

  • c Model 3 controlled for variables in model 2, except season and SES, to include the ECAS and Irish studies.

  • d Model 4 controlled for variables in model 3, except for antenatal care and maternal education, to include the Scottish study.