Children and covariates in the CPP sample.
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Source: Collaborative Perinatal Project (CPP).Notes: “Basic covariates” include sex, gestation weeks, mother's race, parental ages at birth, marital status, parental history of mental illness, and the family socioeconomic index. Observations missing gestation and twin data are dropped successively in rows 2 and 3.
创建时间：
2015-12-02
