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cs_chol
2012 Aug 10
1
Direct Method Age-Adjustment to Complex Survey Data
....df[ , DemoKeepVars ] ,
NHANES.0910.TCHOL_F.df[ , TCHOLKeepVars ] ,
all = T
)
# keep only individuals who took the "mobile examination"
x <- subset( x , RIDSTATR %in% 2 )
# make a few recodes..
x <-
transform(
x ,
# high cholesterol
HI_CHOL =
ifelse( LBXTC >= 240 , 1 , 0 ) ,
# four race/ethnicity categories
race =
ifelse( RIDRETH1 %in% 1:2 , 3 ,
ifelse( RIDRETH1 %in% 3 , 1 ,
ifelse( RIDRETH1 %in% 4 , 2 ,
ifelse( RIDRETH1 %in% 5 , 4 ,
NA ) )...