Unadjusted relationship between pre-pregnancy BMI and breastfeeding behaviours for the whole sample and by ethnicity
| Initiation (n=17 113) | Early cessation (n=11 989) | Longevity (n=11 989) | ||||
| Prevalence | OR (95% CI) | Prevalence | OR (95% CI) | Prevalence | OR (95% CI) | |
| Whole sample | ||||||
| Underweight | 61.48 | 0.63 (0.54 to 0.74) | 19.78 | 1.32 (1.05 to 1.66) | 36.79 | 0.79 (0.65 to 0.96) |
| Healthy weight | 71.61 | 1.00 | 15.71 | 1.00 | 42.24 | 1.00 |
| Overweight | 68.43 | 0.86 (0.77 to 0.96) | 22.89 | 1.59 (1.38 to 1.83) | 35.49 | 0.75 (0.67 to 0.84) |
| Obese | 67.77 | 0.83 (0.72 to 0.96) | 23.30 | 1.63 (1.35 to 1.97) | 29.83 | 0.58 (0.48 to 0.69) |
| White | (n=15 341) | (n=10 461) | ||||
| Underweight | 56.57 | 0.56 (0.46 to 0.67) | 23.05 | 1.51 (1.17 to 1.97) | 33.71 | 0.72 (0.57 to 0.92) |
| Healthy weight | 70.10 | 1.00 | 16.48 | 1.00 | 41.23 | 1.00 |
| Overweight | 66.22 | 0.84 (0.74 to 0.94) | 24.06 | 1.61 (1.38 to 1.86) | 33.70 | 0.72 (0.63 to 0.82) |
| Obese | 65.24 | 0.80 (0.69 to 0.93) | 25.50 | 1.73 (1.40 to 2.14) | 27.06 | 0.52 (0.43 to 0.64) |
| Mixed | (n=151) | (n=143) | ||||
| Underweight | 100.00 | 1.00 (empty) | 09.25 | 1.45 (0.14 to 14.90) | 33.43 | 0.52 (0.15 to 1.80) |
| Healthy weight | 86.47 | 1.00 | 06.58 | 1.00 | 48.79 | 1.00 |
| Overweight | 84.87 | 0.88 (0.23 to 3.35) | 12.16 | 1.96 (0.38 to 10.26) | 48.48 | 0.98 (0.35 to 2.72) |
| Obese | 95.04 | 3.00 (0.64 to 13.98) | 02.62 | 0.38 (0.04 to 3.30) | 50.79 | 1.08 (0. 33 to 3.50) |
| Indian | (n=316) | (n=267) | ||||
| Underweight | 83.21 | 0.88 (0.31 to 2.51) | 08.77 | 0.89(.26 to 3.11) | 54.37 | 1.27 (0.59 to 2.71) |
| Healthy weight | 84.98 | 1.00 | 09.69 | 1.00 | 48.28 | 1.00 |
| Overweight | 86.42 | 1.12 (0.45 to 2.81) | 25.52 | 3.19 (1.25 to 8.17) | 42.63 | 0.79 (0.38 to 1.64) |
| Obese | 74.03 | 0.50 (0.12 to 2.07) | 21.42 | 2.54 (0.84 to 7.68) | 57.16 | 1.42 (0.36 to 5.61) |
| Pakistani | (n=467) | (n=360) | ||||
| Underweight | 71.71 | 0.71 (0.46 to 1.10) | 7.50 | 0.38 (0.16 to 0.91) | 40.13 | 1.28 (0.64 to 2.56) |
| Healthy weight | 78.03 | 1.00 | 17.39 | 1.00 | 34.32 | 1.00 |
| Overweight | 75.87 | 0.89 (0.65 to 1.20) | 23.25 | 1.44 (0.90 to 2.30) | 33.41 | 0.96 (0.62 to 1.48) |
| Obese | 77.26 | 0.96 (0.45 to 2.01) | 8.69 | 0.45 (0.22 to 0.95) | 48.61 | 1.81 (0.90 to 3.61) |
| Bangladeshi | (n=122) | (n=107) | ||||
| Underweight | 91.06 | 1.35 (0.52 to 3.47) | 23.9 | 3.49 (0.88 to 13.96) | 30.20 | 0.64 (0.26 to 1.55) |
| Healthy weight | 88.33 | 1.00 | 8.24 | 1.00 | 40.33 | 1.00 |
| Overweight | 82.96 | 0.64 (0.22 to 1.89) | 11.10 | 1.40 (0.71 to 2.74) | 39.07 | 0.94 (0.40 to 2.22) |
| Obese | 95.06 | 2.54 (0.32 to 20.37) | 26.11 | 3.93(0.74-20-81) | 30.30 | 0.64 (0.23 to 1.76) |
| Black Caribbean | (n=170) | (n=169) | ||||
| Underweight | 100.00 | 1.00 (empty) | 16.80 | 3.18 (0.77 to 13.02) | 62.09 | 1.45 (0.40 to 5.19) |
| Healthy weight | 89.02 | 1.00 | 5.98 | 1.00 | 52.93 | 1.00 |
| Overweight | 93.69 | 1.83 (0.55 to 6.14) | 3.18 | 0.52 (0.12 to 2.28) | 59.96 | 1.33 (0.53 to 3.29) |
| Obese | 94.10 | 1.97 (0.39 to 9.87) | 14.35 | 2.64 (0.60 to 11.56) | 23.63 | 0.27 (0.10 to 0.70) |
| Black African | (n=193) | (n=194) | ||||
| Underweight | 100.00 | 1.00 (empty) | 100.00 | 1.00(empty) | 61.62 | 0.92 (0.23 to 3.69) |
| Healthy weight | 95.86 | 1.00 | 8.43 | 1.00 | 63.40 | 1.00 |
| Overweight | 92.93 | 0.57 (0.10 to 3.20) | 6.49 | 0.75 (0.24 to 2.41) | 57.65 | 0.78 (0.42 to 1.44) |
| Obese | 95.75 | 0.97 (0.16 to 5.88) | 5.17 | 0.59 (0.16 to 2.12) | 55.83 | 0.72 (0.34 to 1.52) |
| Other including Chinese | (n=313) | (n=286) | ||||
| Underweight | 91.61 | 1.08 (0.37 to 3.12) | 4.28 | 0.79 (0.19 to 3.21) | 47.39 | 0.48 (0.19 to 1.17) |
| Healthy weight | 91.01 | 1.00 | 5.36 | 1.00 | 65.08 | 1.00 |
| Overweight | 91.32 | 1.04 (0.42 to 2.59) | 23.43 | 5.41 (1.95 to 15.00) | 47.13 | 0.47 (0.22 to 1.02) |
| Obese | 94.84 | 1.81 (0.23 to 14.52) | 9.60 | 1.88 (0.22 to 16.20) | 56.12 | 0.68 (0.15 to 3.02) |
Note: n for breastfeeding early cessation (in the first week) and longevity (past 4 months) are conditional on breastfeeding initiation (ever breastfeeding, at least once). Percentages relate to weighted number of cases. All estimates obtained using ‘svy’ commands in Stata.