Table 2. Weight loss (kg) from delivery at 1 and 6 months postpartum.
| Time point | Feeding type | Maternal prepregnancy BMI category | |||||
|---|---|---|---|---|---|---|---|
| Underweight n = 10647 |
Normal weight n = 48293 |
Overweight n = 4506 |
Obese n = 1023 |
All participants n = 64469 |
|||
| 1 month | Overall | FB | 6.9±2.06* [4467] | 7.2±2.33*** [20190] | 7.8±2.73** [1416] | 8.0±2.89 [267] | 7.2±2.32*** [26340] |
| NFB | 6.8±2.28 [6180] | 7.1±2.41 [28103] | 7.5±3.04 [3090] | 8.0±3.09 [756] | 7.1±2.47 [38129] | ||
| Weight gain during pregnancy | |||||||
| Below IOM recommendations | FB | 6.4±1.87*** [3272] | 6.6±2.18*** [12095] | 6.8±3.06** [487] | 7.3±2.74 [119] | 6.5±2.16*** [15973] | |
| NFB | 6.2±2.03 [4329] | 6.4±2.16 [16391] | 6.3±3.52 [1072] | 7.1±2.66 [359] | 6.4±2.23 [22151] | ||
| Within IOM recommendations | FB | 8.1±1.72 [1103] | 8.0±1.94*** [6827] | 7.8±2.20 [603] | 7.9±2.49 [95] | 8.0±1.94*** [8628] | |
| NFB | 8.1±1.80 [1676] | 7.9±2.12 [9587] | 7.6±2.26 [1220] | 8.1±2.51 [213] | 7.9±2.10 [12696] | ||
| Above IOM recommendations | FB | 10.2±3.21 [92] | 9.5±2.76 [1268] | 9.2±2.43 [326] | 9.9±3.06 [53] | 9.5±2.74 [1739] | |
| NFB | 9.9±4.00 [175] | 9.5±2.84 [2125] | 8.9±2.73 [798] | 9.5±3.81 [184] | 9.4±2.96 [3282] | ||
| 6 month | Overall | FB | 9.9±3.42*** [4467] | 10.4±3.65*** [20190] | 10.6±4.57*** [1416] | 10.0±5.83* [267] | 10.3±3.71*** [26340] |
| NFB | 9.5±3.42 [6180] | 9.7±3.79 [28103] | 9.1±5.00 [3090] | 9.1±6.30 [756] | 9.6±3.92 [38129] | ||
| Weight gain during pregnancy | |||||||
| Below IOM recommendations | FB | 8.9±3.06*** [3272] | 9.0±3.21*** [12095] | 8.5±4.48*** [487] | 8.5±6.03* [119] | 9.0±3.26*** [15973] | |
| NFB | 8.4±2.89 [4329] | 8.4±3.30 [16391] | 6.6±4.87 [1072] | 7.1±5.46 [359] | 8.3±3.39 [22151] | ||
| Within IOM recommendations | FB | 12.4±2.59*** [1103] | 12.0±3.01*** [6827] | 10.8±3.94*** [603] | 9.5±4.37 [95] | 11.9±3.08*** [8628] | |
| NFB | 11.8±2.88 [1676] | 11.2±3.21 [9587] | 9.4±4.07 [1220] | 9.1±5.29 [213] | 11.1±3.36 [12696] | ||
| Above IOM recommendations | FB | 15.4±3.86 [92] | 14.6±4.12*** [1268] | 13.3±4.24*** [326] | 14.6±5.43 [53] | 14.4±4.21*** [1739] | |
| NFB | 14.6±4.34 [175] | 13.8±4.36 [2125] | 12.0±4.77 [798] | 12.8±7.18 [184] | 13.3±4.73 [3282] | ||
Mean±SD, N in brackets
*p<0.05
**p<0.01
***p<0.001.
Weight gain during pregnancy = (weight at delivery)−(pre-pregnancy weight). BMI: body mass index, FB: full breast-feeding, NFB: non full breast-feeding, IOM: Institute of Medicine.