Factors associated with age of weaning (weeks)
| Study | Factor | Coefficient | p Value |
|---|---|---|---|
| Stepwise multiple regression models including type of milk fed, maternal age, birth weight, sex, whether mother and father smoked during 2nd and 3rd trimesters, social class, child’s birth order, maternal education (see text). Preterm study models also included infant gestational age, whether infant required ventilation, duration of ventilation, and proportion of human milk in the diet. Only variables included in the final models are shown in the table. | |||
| Term AGA (N) | Maternal age (years) | 0.14 | 0.001 |
| Breast milk given (1=y, 2=n) | −1.5 | 0.001 | |
| Term AGA (I) | Breast milk given (1=y, 2=n) | −1.65 | 0.001 |
| Maternal smoking (1=n, 2=y) | −1.9 | 0.001 | |
| Birth weight (kg) | −1.0 | 0.014 | |
| Preterm (B) | Maternal smoking (1=n, 2=y) | −2.0 | 0.005 |
| Proportion of human milk (%) during neonatal period | 0.04 | 0.006 | |