Table 4.
Adjusted multivariable logistic regression, associations between intrapartum interventions and breastfeeding outcomes at 3-months and 6-months post-partum
| Exclusive breastfeeding at 3-months | Any breastfeeding at 3-months | Exclusive breastfeeding at 6-months | Any breastfeeding at 6-months | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| N (%) | AdjORa (95% CI) | P-value | N (%) | AdjORa (95% CI) | P-value | N (%) | AdjORa (95% CI) | P-value | N (%) | AdjORa (95% CI) | P-value | |
| Method of Birth | ||||||||||||
| Vaginal Birth | 32,636 (54.9) | 1 | – | 43,211 (72.7) | 1 | – | 9622 (15.2) | 1 | – | 36,446 (57.7) | 1 | – |
| Pre-labour CS | 8789 (47.9) | 0.73 (0.71–0.76) | < 0.001 | 12,308 (67.1) | 0.70 (0.68–0.73) | < 0.001 | 2512 (13.0) | 0.81 (0.77–0.86) | < 0.001 | 9781 (50.6) | 0.72 (0.69–0.74) | < 0.001 |
| In-labour CS | 5278 (46.9) | 0.79 (0.76–0.83) | < 0.001 | 7569 (69.2) | 0.79 (0.75–0.83) | < 0.001 | 1579 (13.1) | 0.88 (0.82–0.93) | < 0.001 | 6172 (51.2) | 0.80 (0.77–0.84) | < 0.001 |
| Epidural Analgesia | ||||||||||||
| No | 34,776 (54.3) | 1 | – | 46,289 (72.3) | 1 | – | 10,166 (15.0) | 1 | – | 38,949 (57.4) | 1 | – |
| Yes | 11,927 (47.6) | 0.77 (0.75–0.80) | < 0.001 | 16,799 (67.1) | 0.77 (0.74–0.80) | < 0.001 | 3547 (13.3) | 0.89 (0.85–0.93) | < 0.001 | 13,451 (50.5) | 0.76 (0.74–0.78) | < 0.001 |
| Synthetic Oxytocin Infusion | ||||||||||||
| No | 32,052 (54.2) | 1 | – | 42,607 (72.1) | 1 | – | 9429 (15.0) | 1 | – | 35,711 (56.8) | 1 | – |
| Yes | 14,651 (48.9) | 0.89 (0.86–0.92) | < 0.001 | 20,481 (68.4) | 0.91 (0.88–0.94) | < 0.001 | 4284 (13.5) | 0.95 (0.91–0.99) | < 0.001 | 16,689 (52.8) | 0.92 (0.90–0.95) | < 0.001 |
| Number of Interventions Received | ||||||||||||
| None | 18,014 (59.2) | 1 | – | 23,096 (75.9) | 1 | – | 5361 (16.6) | 1 | – | 20,073 (62.0) | 1 | – |
| One | 18,935 (50.2) | 0.71 (0.68–0.73) | < 0.001 | 26,070 (69.1) | 0.70 (0.66–0.72) | < 0.001 | 5431 (13.6) | 0.82 (0.79–0.86) | < 0.001 | 21,143 (53.0) | 0.69 (0.67–0.72) | < 0.001 |
| Two | 7524 (47.6) | 0.65 (0.63–0.68) | < 0.001 | 10,642 (67.3) | 0.65 (0.62–0.68) | < 0.001 | 2258 (13.4) | 0.82 (0.78–0.87) | < 0.001 | 8570 (51.0) | 0.66 (0.63–0.69) | < 0.001 |
| Three | 2197 (43.7) | 0.60 (0.56–0.64) | < 0.001 | 3236 (64.3) | 0.58 (0.53–0.62) | < 0.001 | 648 (12.2) | 0.75 (0.68–0.83) | < 0.001 | 2576 (48.4) | 0.61 (0.57–0.65) | < 0.001 |
Abbreviations: OR odds ratio, CI confidence interval
a Adjusted for parity, maternal BMI, SEIFA quintile, smoking status during pregnancy, hospital admission status, maternal age, maternal country region of birth, and infant birth weight