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Derive Date of Birth from Age Components

Source: R/prep_derivation.R
prep_derive_dob_from_components.Rd

Stewardship-specific helper: DOB is sometimes stored as separate year/month/day components or as a decimal age in years. This function reconstructs an approximate DOB or derives age directly when DOB is absent.

Usage

prep_derive_dob_from_components(
  data,
  dob_year_col = "dob_year",
  dob_month_col = "dob_month",
  dob_day_col = "dob_day",
  age_years_col = "age_years",
  reference_date_col = "admission_date",
  dob_output_col = "dob"
)

Arguments

data

Data frame.

dob_year_col

Character. Year component column. Default "dob_year".

dob_month_col

Character. Month component column. Default "dob_month".

dob_day_col

Character. Day component column. Default "dob_day".

age_years_col

Character. Decimal age in years. Default "age_years".

reference_date_col

Character. Reference date for age-based DOB estimation. Default "admission_date".

dob_output_col

Character. Output DOB column. Default "dob".

Value

Data frame with dob column added/populated.

Details

Strategies (applied in order):

  1. If dob_year_col, dob_month_col, and dob_day_col are present, assemble into a Date.

  2. If age_years_col is present and a reference date exists, estimate DOB as reference_date - age_years * 365.25.