ORs and 95% CIs for not breast feeding exclusively in unadjusted and adjusted logistic regression analyses at discharge from neonatal units in moderately preterm infants (GA 32–36 weeks, n=22 914)
| Percentage of infants exclusively breast fed | Unadjusted | Adjusted† | ||
|---|---|---|---|---|
| n (%) | OR (95% CI) | OR (95% CI) | ||
| Infant birth year | 1.09 (1.08 to 1.10)** | 1.09 (1.08 to 1.10)** | ||
| Maternal factors | ||||
| Maternal mental illness | ||||
| Yes | 828 (3.6) | 25% | 1.74 (1.51 to 2.00)** | 1.59 (1.38 to 1.83)** |
| No | 22 086 (96.4) | 41% | ref | |
| Gestational diabetes | ||||
| Yes | 483 (2.1) | 34% | 1.42 (1.18 to 1.70)** | |
| No | 22 431 (97.9) | 40% | ref | |
| Pre-eclampsia | ||||
| Yes | 3040 (13) | 39% | 1.32 (1.22 to 1.42)** | |
| No | 19 874 (87) | 41% | ref | |
| Caesarean section‡ | ||||
| Yes | 10 079 (44) | 37% | 1.71 (1.62 to 1.80)** | |
| No | 12 802 (56) | 48% | ref | |
| Infant factors | ||||
| Multiple birth | ||||
| Multiple | 5361 (23) | 29% | 2.88 (2.70 to 3.07)** | |
| Singleton | 17 553 (77) | 45% | ref | |
| Small for GA | ||||
| Yes | 1621 (7.1) | 31% | 1.56 (1.41 to 1.73)** | 1.51 (1.36 to 1.67)** |
| No | 21 293 (92.9) | 41% | ref | |
Data from the Swedish Neonatal Quality register from 2004 to 2013.
*p<0.05.
**p<0.001.
†Adjusted for factors that negatively affected breast feeding and which became more prevalent from 2004 to 2013. These factors include maternal mental illness, small for GA and infant birth year.
‡Data were missing for 33 infants.
GA, gestational age.