get_eff_mod_names: Get effect modifiers
Description
Get effect modifiers
Usage
get_eff_mod_names(formula, trt_var = "trt")
Value
Effect modifiers strings names
Arguments
- formula
Linear regression formula object. Prognostic factors (PF) are main effects and effect modifiers (EM) are
interactions with the treatment variable, e.g., y ~ X1 + trt + trt:X2. For covariates as both PF and EM use * syntax.
- trt_var
Treatment variable name; Default 'trt'.