Maternal, pregnancy and neonatal risk factors and significance for postmenstrual age at hospital discharge in moderately preterm infants that were exclusively or in part breast fed (n = 1857) and infants that were not breast fed (n = 197)* at discharge from hospital to home
| Exclusively or part breast feeding | No breast feeding | |
| Regression coefficient (p value) | Regression coefficient (p value) | |
| Maternal age ⩾35 years | 2.61 (<0.001) | 3.04 (NS) |
| Multiplets | 4.46 (<0.001) | 3.06 (NS) |
| Gestational age at birth | −0.30 (0.092) | 0.31 (NS) |
| Small for gestational age | 5.41 (<0.001) | 4.41 (NS) |
| Respiratory distress syndrome | 3.21 (<0.001) | 5.16 (0.038) |
| Infection | 1.94 (0.004) | 0.42 (NS) |
| Hypoglycaemia | 2.10 (<0.001) | 3.50 (NS) |
| Hyperbilirubinaemia | 1.13 (0.013) | 0.21 (NS) |
| Severe neonatal morbidity | 9.80 (<0.001) | 10.6 (NS) |
| Intercept (days) | 264.7 (<0.001) | 247.3 (<0.001) |
Severe neonatal morbidity includes infants with one or more of the following diagnoses: retinopathy of prematurity grade 3–4, intraventricular haemorrhage grade 3–4 or bronchopulmonary dysplasia. A p value >0.05 was considered non-significant (NS).
R2 in multivariate model for breastfed infants = 0.14 (p<0.001) and for not breastfed infants = 0.12 (p = 0.005).
*Some missing data on maternal age (n = 14/1857 and 3/197 in the breastfed and not breastfed group, respectively).