static_match function

Static Matching

This function calls match_cohort_ once and then removes the pairs whose exposure times do not coincide. It returns the adjusted cohort, a summary of the matching result, and the balance of the cohort before and after matching.

static_match(
  data_set,
  outcome_date_col,
  censoring_date_col,
  immunization_date_col,
  vacc_status_col,
  vaccinated_status,
  unvaccinated_status,
  start_cohort,
  end_cohort,
  nearest,
  exact
)

Arguments

• data_set: data.frame with cohort information.
• outcome_date_col: Name of the column that contains the outcome dates.
• censoring_date_col: Name of the column that contains the censoring date.
• immunization_date_col: Name of the column that contains the immunization date to set the beginning of the follow-up period (t0_follow_up).
• vacc_status_col: Name of the column containing the vaccination.
• vaccinated_status: Status assigned to the vaccinated population.
• unvaccinated_status: Status assigned to the unvaccinated population.
• start_cohort: Start date of the study.
• end_cohort: End date of the study.
• nearest: Named vector with name(s) of column(s) for nearest matching and caliper(s) for each variable (e.g., nearest = c("characteristic1" = n1, "characteristic2" = n2), where n1 and n2 are the calipers).
• exact: Name(s) of column(s) for exact matching

Returns

List with results from static match: match: adjusted cohort, summary: matching summary, balance_all: balance of the cohort before matching, balance_matched: balance of the cohort after matching.