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Calculates equivalent doses

Source: R/convert.R
to_ap.Rd

As in to_cpz(), to_ap() converts doses of antipsychotics into equivalent doses to a reference antipsychotic. Whereas in to_cpz() the reference antipsychotic is chlorpromazine (CPZ), to_ap() converts to equivalents of an arbitrary antipsychotic specified as a string to convert_to_ap. Conversion factors are specified in the key.

Usage

to_ap(
  input_data,
  convert_to_ap = "olanzapine",
  convert_to_route = "oral",
  ap_label,
  dose_label,
  route = "oral",
  key = chlorpromazineR::gardner2010,
  cpz_eq_label = "cpz_eq",
  ref_eq_label = "ap_eq",
  factor_label = "cpz_conv_factor",
  route_label = NULL,
  q_label = NULL
)

Arguments

input_data

data.frame with antipsychotic name and dose data

convert_to_ap

name of desired reference antipsychotic

convert_to_route

the route of the desired reference antipsychotic

ap_label

column in x that stores antipsychotic name

dose_label

column in x that stores dose

route

options include "oral", "sai", "lai" or "mixed"

key

source of the conversion factors--defaults to Gardner et al. 2010

cpz_eq_label

the name of the column to be created, to save the calculated CPZ-equivalent dose

ref_eq_label

the name of the column to be created to save the doses in terms of the specified reference antipsychotic (in convert_to_ap)

factor_label

the name of the column to be created to store the conversion factors

route_label

if "mixed" route is specified, provide the column that stores the route information

q_label

if long-acting injectable doses are included, provide the column that stores the injection frequency (days), or only if the doses have already been divided, set q_label = 1.

Value

data.frame with new variables storing conversion factor and CPZ-equivalent doses

See also

Other conversion functions: to_cpz()

Examples

participant_ID <- c("P01", "P02", "P03", "P04")
age <- c(42, 29, 30, 60) # not used in calculation, just shows other data
                         # can exist in the data.frame
antipsychotic <- c("olanzapine", "olanzapine", "quetiapine", "ziprasidone")
dose <- c(10, 12.5, 300, 60)
example_oral <- data.frame(participant_ID, age, antipsychotic, dose,
                           stringsAsFactors = FALSE)
to_ap(example_oral, convert_to_ap="olanzapine", convert_to_route="oral",
      ap_label = "antipsychotic", dose_label = "dose", route = "oral")
#>   participant_ID age antipsychotic  dose cpz_conv_factor cpz_eq ap_eq
#> 1            P01  42    olanzapine  10.0           30.00    300  10.0
#> 2            P02  29    olanzapine  12.5           30.00    375  12.5
#> 3            P03  30    quetiapine 300.0            0.80    240   8.0
#> 4            P04  60   ziprasidone  60.0            3.75    225   7.5