Internal function, not called directly.
summary_factorlist2(.data, dependent, explanatory, cont = "mean",
cont_cut = 5, p = FALSE, na_include = FALSE, column = FALSE,
total_col = FALSE, orderbytotal = FALSE, fit_id = FALSE,
na_to_missing = TRUE, add_dependent_label = FALSE,
dependent_label_prefix = "Dependent: ", dependent_label_suffix = "")