Arguments

• object: the output from matchit().
• interactions: an option to calculate summary statistics in sum.all and sum.matched for all covariates, their squares, and two-way interactions when interactions = TRUE and only the covariates themselves when interactions = FALSE, (DEFAULT = FALSE).
• addlvariables: additional variables on which to calculate the diagnostic statistics (in addition to the variables included in the matching procedure) (DEFAULT = NULL). addlvariables: a data frame containing additional variables whose balance is examined. The data should come with the same number of units and units in the same order as in the data set used for matchit().
• standardize: a logical variable indicating whether to standardize balance measures, i.e., whether the difference in means should be divided by the standard deviation in the original treated group. (DEFAULT = FALSE)