Drop rows with metformin purchases for the treatment of PCOS

Takes the output from keep_gld_purchases() and bef (information on sex and date of birth) to drop rows with metformin purchases that are potentially for the treatment of polycystic ovary syndrome. This function only performs a filtering operation so it outputs the same structure and variables as the input from keep_gld_purchases(), except the addition of a logical helper variable no_pcos that is used in later functions. After these rows have been dropped, the output is used by drop_pregnancies().

Usage

drop_pcos(gld_purchases, bef)

Arguments

gld_purchases

The output from keep_gld_purchases().

bef

The bef register.

Value

The same type as the input data, as a duckplyr::duckdb_tibble(). It also has the same columns as keep_gld_purchases(), except for a logical helper variable no_pcos that is used in later functions.

See also

See the vignette("algorithm") for the logic used to filter these patients.