four-class models fit significantly better than the three-class models (outpatient: posttreatment BLRT = 6.22, p = .31; 6-month BLRT = 5.68, p = .27; 12-month BLRT = 7.77, p = .08; aftercare: posttreatment BLRT = 3.69, p = .67; 6-month BLRT = 4.20, p = .50; 12-month BLRT = 2.94, p = .99). The three-class models also had lower aBICs than the two-or four-class models at all time points. Additional testing of the three-class model provided support for measurement invariance with respect to time and gender across all three time points.
