Simple smoking status

Source: R/smoking.R

This function creates a derived smoking variable (smoke_simple) with four categories:

  • non-smoker (never smoked)

  • current smoker (daily and occasional?)

  • former daily smoker quit =<5 years or former occasional smoker

  • former daily smoker quit >5 years

smoke_simple_fun(SMKDSTY_cat5, time_quit_smoking)

Arguments

SMKDSTY_cat5

derived variable that classifies an individual's smoking status. This variable captures cycles 2001-2018.
time_quit_smoking

derived variable that calculates the approximate time a former smoker has quit smoking. See time_quit_smoking_fun for documentation on how variable was derived.

Examples

# Using the 'smoke_simple_fun' function to create the derived smoking   
# variable across CCHS cycles.
# smoke_simple_fun() is specified in the variable_details.csv

# To create a harmonized smoke_simple variable across CCHS cycles, use 
# rec_with_table() for each CCHS cycle and specify smoke_simple_fun and 
# the required base variables. Since time_quit_smoking_der is also a derived 
# variable, you will have to specify the variables that are derived from it.
# Using merge_rec_data(), you can combine smoke_simple across cycles.

library(cchsflow)

smoke_simple2009_2010 <- rec_with_table(
  cchs2009_2010_p, c(
    "SMKDSTY", "SMK_09A_B", "SMKG09C", "time_quit_smoking",
    "smoke_simple"
  )
)

#> No variable_details detected.
#>               Loading cchsflow variable_details
#> Using the passed data variable name as database_name
#> Warning: SMKDSTY is missing from variable details therefore cannot be recoded
#> NOTE for SMKG09C: Don't know (7) and refusal (8) not included in CCHS 2015-2016 and CCHS 2017-2018
#> Warning: smoke_simple could not be derived because SMKDSTY_cat5 was never specified nor is it a function variable,
#>             therefore it was not recoded 
#> smoke_simple could not be derived because time_quit_smoking was never specified nor is it a function variable,
#>             therefore it was not recoded 

head(smoke_simple2009_2010)

#>   SMK_09A_B SMKG09C time_quit_smoking
#> 1     NA(a)   NA(a)                NA
#> 2     NA(a)   NA(a)                NA
#> 3     NA(a)   NA(a)                NA
#> 4         4       2                 8
#> 5         4       3                12
#> 6         4       3                12

smoke_simple2011_2012 <- rec_with_table(
  cchs2011_2012_p,c(
   "SMKDSTY", "SMK_09A_B", "SMKG09C", "time_quit_smoking",
   "smoke_simple"
  )
)

#> No variable_details detected.
#>               Loading cchsflow variable_details
#> Using the passed data variable name as database_name
#> Warning: SMKDSTY is missing from variable details therefore cannot be recoded
#> NOTE for SMKG09C: Don't know (7) and refusal (8) not included in CCHS 2015-2016 and CCHS 2017-2018
#> Warning: smoke_simple could not be derived because SMKDSTY_cat5 was never specified nor is it a function variable,
#>             therefore it was not recoded 
#> smoke_simple could not be derived because time_quit_smoking was never specified nor is it a function variable,
#>             therefore it was not recoded 

tail(smoke_simple2011_2012)

#>     SMK_09A_B SMKG09C time_quit_smoking
#> 195         4       3                12
#> 196     NA(a)   NA(a)                NA
#> 197     NA(a)   NA(a)                NA
#> 198         4       2                 8
#> 199     NA(a)   NA(a)                NA
#> 200     NA(a)   NA(a)                NA

combined_smoke_simple <- 
suppressWarnings(merge_rec_data(smoke_simple2009_2010,smoke_simple2011_2012))

head(combined_smoke_simple)

#>   SMK_09A_B SMKG09C time_quit_smoking
#> 1     NA(a)   NA(a)                NA
#> 2     NA(a)   NA(a)                NA
#> 3     NA(a)   NA(a)                NA
#> 4         4       2                 8
#> 5         4       3                12
#> 6         4       3                12
tail(combined_smoke_simple)

#>     SMK_09A_B SMKG09C time_quit_smoking
#> 395         4       3                12
#> 396     NA(a)   NA(a)                NA
#> 397     NA(a)   NA(a)                NA
#> 398         4       2                 8
#> 399     NA(a)   NA(a)                NA
#> 400     NA(a)   NA(a)                NA