This function adds utility values to a data frame based on a specified version of EQ-5D and a country name.
Usage
.add_utility(df, eq5d_version, country)
Value
A data frame with an additional column named `utility` containing the calculated utility values. If the input country name is not found in the country_codes dataset, a list of available codes is printed, and subsequentyl an error message is displayed and the function stops.
Arguments
df
A data frame containing the state data. The state must be included in the data frame as a character vector under the column named `state`.
eq5d_version
A character string specifying the version of EQ-5D, i.e. 3L or 5L.
country
A character string representing the name of the country. This could be in a 2-letter format, full name or short name, as specified in the country_codes datasets.