methods
Desigh ang Procedures
the proposed study is a secondary anslysis of an existing longitudinal data set,the Austin New Mothers Study,inwhish women were followed from childbirth to 1 year postpartum.for this analysis,data were primarly derived assessment at 6 weeka postpartum.Some descriptive variable were collected at enrollment in the hospital at 1-3 days after chilbirth.Institutional review board approval was obtained before initiating this secondary analysis are found in Supplemental Digital Content1.