Factors associated with any breast milk intake at 6 months
| Factor | n | Per cent | OR | 95% CI | Adjusted OR n=866* | 95% CI |
|---|---|---|---|---|---|---|
| Maternal education | ||||||
| No degree (ref) | 200/366 | 54.6 | 1 | |||
| Degree/diploma | 418/546 | 76.6 | 2.71 | 2.04 to 3.61 | 2.80 | 2.07 to 3.79 |
| Maternal age (years) | ||||||
| 26 to <36 (ref) | 382/561 | 68.1 | 1 | |||
| Less than 26 | 34/65 | 52.3 | 0.51 | 0.31 to 0.86 | † | |
| ≥36 | 193/273 | 70.7 | 1.1 | 0.82 to 1.50 | ||
| Country of birth | ||||||
| Not Australia (ref) | 216/293 | 73.3 | 1 | |||
| Australia | 401/618 | 64.9 | 0.66 | 0.48 to 0.90 | † | |
| BMI | ||||||
| Under 30 (ref) | 519/741 | 70.0 | 1 | |||
| ≥30 | 68/125 | 54.4 | 0.51 | 0.35 to 0.75 | † | |
| Public admission | ||||||
| Public (ref) | 404/596 | 67.8 | 1 | |||
| Private | 214/316 | 67.7 | 1.00 | 0.74 to 1.33 | ‡ | |
| Parity | ||||||
| Multipara (ref) | 317/456 | 69.5 | 1 | |||
| Primipara | 310/456 | 66.0 | 0.85 | 0.64 to 1.12 | ‡ | |
| Breastfeeding intention | ||||||
| <6 months (ref) | 69/161 | 42.9 | 1 | 1 | ||
| ≥6 months | 549/751 | 73.1 | 3.62 | 2.55 to 5.15 | 3.46 | 2.39 to 5.00 |
| Type of birth | ||||||
| Spontaneous vaginal (ref) | 279/379 | 73.6 | 1 | |||
| Instrumental | 70/120 | 58.3 | 0.50 | 0.33 to 0.77 | † | |
| Caesarean section | 269/413 | 65.1 | 0.67 | 0.49 to 0.91 | ||
| Epidural for labour or birth | ||||||
| No (ref) | 266/366 | 72.7 | 1 | |||
| Yes | 352/546 | 64.5 | 0.68 | 0.51 to 0.91 | † | |
| Breastfeeding problems reported at recruitment | ||||||
| No (ref) | 465/646 | 72.0 | 1 | |||
| Yes | 153/266 | 57.5 | 0.53 | 0.39 to 0.71 | 0.58 | 0.41 to 0.81 |
| Breast milk feeding method | ||||||
| Not all direct (ref) | 279/468 | 59.6 | 1 | |||
| Direct only | 339/444 | 76.4 | 2.19 | 1.64 to 2.91 | 1.80 | 1.30 to 2.49 |
*n=866 for the adjusted OR calculations analysis.
†These variables were included in the model initially, but not being significant were removed.
‡These variables not being significant at univariate level were not included in full model.
BMI, body mass index; ref, reference category.