1.
母孕前体重与孕期体重增长情况分析 [n（%）]
| 孕前体重分组 | 例数 | 孕期体重增长 | ||
| 不足 | 正常 | 过多 | ||
| 低体重组 | 148 | 52(35.1) | 51(34.5) | 45(30.4) |
| 正常组 | 763 | 156(20.4) | 291(38.1) | 316(41.4) |
| 超重/肥胖组 | 216 | 1(0.5) | 42(19.4) | 173(80.1) |
| χ2值 | 142.32 | |||
| P值 | ＜0.001 | |||
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