Milk yield according to adherence to international recommendations on time to first expression (unadjusted analysis)
| Day 4 milk yield (g) | Day 14 milk yield (g) | Day 21 milk yield (g) | ||||
| Coefficient (95% CI) | P value | Coefficient (95% CI) | P value | Coefficient (95% CI) | P value | |
| Time to first expression attempt after birth (presented in four different formats): | ||||||
| Per hour later | −1.3 (−4.2 to 1.7) | 0.40 | −5.6 (−11.8 to 0.6) | 0.07 | −1.0 (−7.3 to 5.2) | 0.75 |
| ≤6 hours compared with >6 hours (international recommendation) | 88.3 (7.1 to 169.4) | 0.03 | 155.7 (12.2 to 299.3) | 0.03 | 73.6 (−91.4 to 238.7) | 0.38 |
| ≤2 hours compared with >2 hours (UK recommendation) | 79.6 (−24.6 to 183.7) | 0.13 | 126.0 (−63.9 to 315.9) | 0.19 | 127.5 (−75.5 to 330.5) | 0.22 |
| Compared with ≤2 hours: | ||||||
| 2 to ≤6 hours | −35.3 (−151.8 to 81.3) | 0.55 | −43.1 (−253.7 to 167.5) | 0.69 | −108.5 (−336.3 to 119.3) | 0.35 |
| >6 hours | −110.7 (−220.7 to −0.6) | 0.05 | −183.8 (−383.0 to 15.4) | 0.07 | −143.1 (−363.4 to 77.2) | 0.20 |
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