This is one of 2 functions used to create a derived variable (COPD_Emph_der) that determines if a respondents has either COPD or Emphysema. 2 different functions have been created to account for the fact that different respiratory variables are used across CCHS cycles. This function is for CCHS cycles (2001-2003, 2009-2014) that use COPD and Emphysema as a combined variable.

COPD_Emph_der_fun2(DHHGAGE_cont, CCC_091)

Arguments

DHHGAGE_cont

continuous age variable.

CCC_091

variable indicating if respondent has either COPD or Emphysema

Value

a categorical variable (COPD_Emph_der) with 3 levels:

  1. respondent is over the age of 35 and has a respiratory condition

  2. respondent is under the age of 35 and has a respiratory condition

  3. respondent does not have a respiratory condition

See also

COPD_Emph_der_fun2

Examples

# COPD_Emph_der_fun2() to create values across CCHS cycles
# (2001-2003, 2009-2014) COPD_Emph_der_fun2() is specified in
# variable_details.csv along with the CCHS variables and cycles included.

# To transform COPD_Emph_der, use rec_with_table() for each CCHS cycle
# and specify COPD_Emph_der, along with the various respiratory
# variables. Then by using merge_rec_data() you can combine COPD_Emph_der
# across cycles.

library(cchsflow)

COPD2001 <- suppressWarnings(rec_with_table(
  cchs2001_p,  c(
    "DHHGAGE_cont", "CCC_091",
    "COPD_Emph_der"
  )
))
#> No variable_details detected.
#>               Loading cchsflow variable_details
#> Using the passed data variable name as database_name
#> NOTE for DHHGAGE_cont: Not applicable, don't know, refusal, not stated (96-99) were options in CCHS 2003, but had zero responses

head(COPD2001)
#>   CCC_091 DHHGAGE_cont COPD_Emph_der
#> 1       2           85             3
#> 2       2           85             3
#> 3       2           32             3
#> 4       2           77             3
#> 5   NA(a)           22         NA(a)
#> 6       2           77             3

COPD2014 <- suppressWarnings(rec_with_table(
  cchs2007_2008_p, c(
    "DHHGAGE_cont", "CCC_091", 
    "COPD_Emph_der"
  )
))
#> No variable_details detected.
#>               Loading cchsflow variable_details
#> Using the passed data variable name as database_name

tail(COPD2014)
#>     DHHGAGE_cont
#> 195           62
#> 196           37
#> 197           77
#> 198           42
#> 199           32
#> 200           72

combined_COPD <- suppressWarnings(merge_rec_data(COPD2001, COPD2014))

head(combined_COPD)
#>   CCC_091 DHHGAGE_cont COPD_Emph_der
#> 1       2           85             3
#> 2       2           85             3
#> 3       2           32             3
#> 4       2           77             3
#> 5   NA(a)           22         NA(a)
#> 6       2           77             3
tail(combined_COPD)
#>     CCC_091 DHHGAGE_cont COPD_Emph_der
#> 395   NA(c)           62         NA(c)
#> 396   NA(c)           37         NA(c)
#> 397   NA(c)           77         NA(c)
#> 398   NA(c)           42         NA(c)
#> 399   NA(c)           32         NA(c)
#> 400   NA(c)           72         NA(c)