Distribution of obstetrician's report of maternal physical grade by birth year of offspring. N=8312 [analyses only conducted on those with complete data]
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Distribution of obstetrician's report of maternal physical grade by birth year of offspring. N=8312 [analyses only conducted on those with complete data]
按子代出生年份划分的产科医师报告的母体身体状况分级分布情况。总样本量N=8312[仅对数据完整的受试者开展分析]
创建时间：
2015-12-02
