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TABLE 3

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

Duration moNZCDS GeSIDSIMSScottishECASCESDISWISSIrishPooled Model 1a (n = 3397)Pooled Model 2bPooled Model 3c (n = 4319)Pooled Model 4d (n = 6006)
Never 1.00 1.00 1.00 1.00 1.00 Not available Not available 1.00 1.00 — 1.00 1.00 
>0–2 1.02 (0.56–1.84) 0.70 (0.41–1.19) 0.81 (0.39–1.69) 0.61 (0.26–1.44) 1.27 (0.46–3.48) 0.68 (0.33–1.42) 0.82 (0.59–1.14) — 0.75 (0.58–0.98) 0.82 (0.67–1.01) 
>2–4 0.47 (0.27–0.83) 0.51 (0.29–0.90) 0.61 (0.04–8.83) 0.63 (0.12–3.23) 0.48 (0.15–1.53) 0.09 (0.02–0.53) 0.61 (0.42–0.87) — 0.44 (0.32–0.60) 0.40 (0.31–0.51) 
4–6 0.56 (0.15–2.07) 0.31 (0.17–0.58) Undefined Undefined 0.60 (0.14–2.54) 3.14 (0.56–17.55) 0.46 (0.29–0.74) — 0.47 (0.31–0.71) 0.37 (0.26–0.52) 
Duration moNZCDS GeSIDSIMSScottishECASCESDISWISSIrishPooled Model 1a (n = 3397)Pooled Model 2bPooled Model 3c (n = 4319)Pooled Model 4d (n = 6006)
Never 1.00 1.00 1.00 1.00 1.00 Not available Not available 1.00 1.00 — 1.00 1.00 
>0–2 1.02 (0.56–1.84) 0.70 (0.41–1.19) 0.81 (0.39–1.69) 0.61 (0.26–1.44) 1.27 (0.46–3.48) 0.68 (0.33–1.42) 0.82 (0.59–1.14) — 0.75 (0.58–0.98) 0.82 (0.67–1.01) 
>2–4 0.47 (0.27–0.83) 0.51 (0.29–0.90) 0.61 (0.04–8.83) 0.63 (0.12–3.23) 0.48 (0.15–1.53) 0.09 (0.02–0.53) 0.61 (0.42–0.87) — 0.44 (0.32–0.60) 0.40 (0.31–0.51) 
4–6 0.56 (0.15–2.07) 0.31 (0.17–0.58) Undefined Undefined 0.60 (0.14–2.54) 3.14 (0.56–17.55) 0.46 (0.29–0.74) — 0.47 (0.31–0.71) 0.37 (0.26–0.52) 

—, Data were not available because these 2 studies had no data on exclusive breastfeeding.

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 could not be run because the CESDI and SWISS studies had no data on exclusive breastfeeding.

c

Model 3 controlled for variables in model 2, except for 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.

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