Design information from the Youth Risk Behaviors Survey (YRBS), together with the single variable ‘Never/Rarely wore bike helmet’. Used as an analysis example by CDC.
A data frame with 15624 observations on the following 4 variables.
primary sampling units
ftp://ftp.cdc.gov/pub/data/yrbs/2015smy/ for files
Centers for Disease Control and Prevention (2016) Software for Analysis of YRBS Data. Previously at https://www.cdc.gov/healthyyouth/data/yrbs/pdf/2015/2015_yrbs_analysis_software.pdf
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data(yrbs) yrbs_design <- svydesign(id=~psu, weight=~weight, strata=~stratum, data=yrbs) yrbs_design <- update(yrbs_design, qn8yes=2-qn8) ci <- svyciprop(~qn8yes, yrbs_design, na.rm=TRUE, method="xlogit") ci ## to print more digits: matches SUDAAN and SPSS exactly, per table 3 of reference coef(ci) SE(ci) attr(ci,"ci")
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