Stratified and Pooled Multivariable ORs (95% CIs) of SIDS for Duration of Exclusive Breastfeeding
| Duration mo . | NZCDS . | GeSID . | SIMS . | Scottish . | ECAS . | CESDI . | SWISS . | Irish . | Pooled Model 1a (n = 3397) . | Pooled Model 2b . | Pooled 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 mo . | NZCDS . | GeSID . | SIMS . | Scottish . | ECAS . | CESDI . | SWISS . | Irish . | Pooled Model 1a (n = 3397) . | Pooled Model 2b . | Pooled 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.
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.
Model 2 could not be run because the CESDI and SWISS studies had no data on exclusive breastfeeding.
Model 3 controlled for variables in model 2, except for season and SES, to include the ECAS and Irish studies.
Model 4 controlled for variables in model 3, except for antenatal care and maternal education, to include the Scottish study.