EHR (version 0.4-11)

idCrosswalk: Create ID Crosswalk

Description

Link ID columns from multiple data sets. De-identified columns are created to make a crosswalk.

Usage

idCrosswalk(data, idcols, visit.id = "subject_id", uniq.id = "subject_uid")

Value

crosswalk of ID columns and their de-identified versions

Arguments

data

list of data.frames

idcols

list of character vectors, indicating ID columns found in each data set given in ‘data’

visit.id

character sting indicating visit-level ID variable (default is "subject_id")

uniq.id

character sting indicating subject-level ID variable (default is "subject_uid")

Details

‘visit.id’ and ‘uniq.id’ may occur multiple times, but should have a one-to-one linkage defined by at least one of the input data sets. A new visit number is generated for each repeated ‘uniq.id’.

Examples

demo_data <- data.frame(subj_id=c(4.1,4.2,5.1,6.1),
                        pat_id=c(14872,14872,24308,37143),
                        gender=c(1,1,0,1),
                        weight=c(34,42,28,63),
                        height=c(142,148,120,167))

conc_data <- data.frame(subj_id=rep((4:6)+0.1,each=5),
                        event=rep(1:5,times=3),
                        conc.level=15*exp(-1*rep(1:5,times=3))+rnorm(15,0,0.1))

data <- list(demo_data, conc_data)
idcols <- list(c('subj_id', 'pat_id'), 'subj_id')
idCrosswalk(data, idcols, visit.id='subj_id', uniq.id='pat_id')