“…Covariates were selected on the basis of factors used in previous studies of the N-SSATS and factors that have been empirically shown to affect substance abuse treatment services (26)(27)(28). They were primary treatment focus (substance abuse, mental health, mix of mental health and substance abuse, general health care, or other); private versus government ownership; facility region (Northeast, Midwest, South, West, or U.S. jurisdiction or territory); hospital location; provision of standard case review with a quality review committee; treatment in language other than English; provision of nonhospital residential substance abuse treatment; provision of regular outpatient treatment; use of a sliding fee scale or treatment free of charge; Medicare reimbursement accepted; Medicaid reimbursement accepted; receipt of federal, state, county, or local funds (yes or no); and licensed or certified by a state substance abuse agency, mental health department, state health department, or hospital authority (one response selected).…”