Estimated total and direct effect of pre-pregnancy BMI groups and pre-pregnancy BMI on breastfeeding initiation, early cessation and longevity
| Pre-pregnancy BMI groups | Initiation | Early cessation | Longevity | |||
| Total effect | Direct effect | Total effect | Direct effect | Total effect | Direct effect | |
| OR (95% CI) | ||||||
| Underweight | 0.95 (0.79 to 1.15) | 0.97 (0.80 to 1.17) | 0.96 (0.74 to 1.23) | 0.98 (0.75 to 1.27) | 1.14 (0.91 to 1.42) | 1.16 (0.92 to 1.46) |
| Healthy weight | 1 | 1 | 1 | 1 | 1 | 1 |
| Overweight | 0.88 (0.78 to 1.00) | 0.88 (0.78 to 0.99) | 1.62 (1.41 to 1.88) | 1.61 (1.39 to 1.86) | 0.74 (0.66 to 0.83) | 0.74 (0.66 to 0.84) |
| Obese | 0.91 (0.77 to 1.07) | 0.90 (0.76 to 1.06) | 1.62 (1.33 to 1.97) | 1.57 (1.29 to 1.92) | 0.57 (0.48 to 0.69) | 0.59 (0.49 to 0.72) |
| Marginal probabilities | ||||||
| Underweight | 69.88 | 70.03 | 17.70 | 18.07 | 34.49 | 41.17 |
| Healthy weight | 70.72 | 70.82 | 18.22 | 18.35 | 38.22 | 38.04 |
| Overweight | 68.53 | 68.58 | 25.89 | 25.86 | 32.20 | 32.11 |
| Obese | 68.96 | 69.02 | 25.87 | 25.45 | 27.43 | 28.00 |