Type of delivery according to birth variables, 1978/79 Ribeirão Preto birth cohort.
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*Totals may not add up to 2063 because of missing values.**P-value refers to the chi-squared test.
创建时间:
2015-12-02

*Totals may not add up to 2063 because of missing values.**P-value refers to the chi-squared test.