ID women that fit inclusion criteria of age and time period

Usage

filter_eligible_women(
  .data,
  .variables_to_keep,
  .age_start,
  .age_end,
  .last_yr,
  .presvcdate,
  .svcend,
  .claims_file
)

.data: MarketScan dataset
.variables_to_keep: Variable names that should appear in the returned dataset
.age_start: int, lower age boundary for inclusion
.age_end: int, upper age boundary for inclusion
.last_yr: int, study end year. Last year of full data on MarketScan dataset
.presvcdate: POSIXct, start of study period minus a certain number of days to capture pregnancy start dates
.svcend: POSIXct, end of study period
.claims_file: chr, "I" for inpatient or "O" for outpatient

Subset dataset