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
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.
Returns
Summary data.frame with the balance of each variable by vaccine status. Numeric variables are reported with means, and categorical/factor variables are reported with proportions. In both cases, the Standardized Mean Difference (SMD) is calculated.