Table 1.
Characteristics of the study population at 4 months postpartum analysed by postpartum infant feeding method (n 470), Dublin, Republic of Ireland
| Formula-feeding (n 164) | Partial breast-feeding (n 114) | Exclusive breast-feeding (n 192) | |||||
|---|---|---|---|---|---|---|---|
| Mean | sd | Mean | sd | Mean | sd | P value* | |
| Age (years) | 30·5 | 5·6 | 32·9 | 4·6 | 31·7 | 4·4 | NS |
| Weight (kg) | 72·2 | 15·5 | 70·9 | 14·6 | 70·1 | 12·6 | NS |
| BMI (kg/m2) | 26·4 | 5·6 | 25·9 | 5·1 | 25·4 | 4·4 | <0·05 |
| % | % | % | |||||
| Obese | 25·0 | 17·5 | 15·1 | 0·01 | |||
| Nulliparous | 34·8 | 53·5 | 43·8 | 0·03 | |||
| Irish nativity | 94·5 | 63·2 | 60·4 | 0·002 | |||
| Currently smoking | 22·6 | 10·5 | 9·9 | <0·001 | |||
| Caesarean section | 17·7 | 24·6 | 20·3 | NS | |||
| Risk of poverty† | 23·8 | 6·2 | 11·5 | 0·002 | |||
| Relative deprivation | 29·3 | 18·4 | 13·0 | 0·002 | |||
| Consistent poverty | 10·4 | 3·5 | 2·6 | 0·002 | |||
| Mean | sd | Mean | sd | Mean | sd | ||
| Any breast-feeding duration (d) | 0 | – | 56·8 | 43·5 | 86·0 | 46·6 | <0·001 |
*P value testing for significant difference between formula-feeding and exclusive breast-feeding (except for ‘Any breast-feeding duration’ variable, where P value tests for significant difference between partial breast-feeding and exclusive breast-feeding) using independent-samples t tests and χ 2 analyses.
†
Data available on n 469.