The demographic data in this report are derived from the Current Population Survey, which covers the civilian, noninstitutional population. Unless otherwise noted, all data come from the CPS Annual ...
Selection bias at study entry can arise for several reasons including selection of patients based on eligibility criteria related to the exposure and outcome, or from deviations between the date the ...
Analysis of the characteristics of mothers, married couples and newlyweds are based on the most recent American Community Survey (ACS) data (2011). The data set was obtained from the IPUMS-USA ...
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