can you match more than two covariates is gender matched in two groups can a covariate match two groups when can we combine two groups in a logistic regression why do i need multiple groups matching how to match two variables does age group mean gender why do I need a covariate to match gender how to match groups can i get covariable scores from more than two groups? what is the best way to match factors to a group is the most efficient way to convert factors to logical when a factor is a covariate how to match covariates between more than two sets can you match gender and age how to group match a factor if two groups are available how to match different groups of covariates what would match two groups in a set of factors? what is the best way to match two groups of data how to match two groups of variable by the group