Rates of AA participation (i.e., any attendance) by condition show somewhat different results (Figure 4, panel C). The GEE model (N=708) showed a significant effect for Time [Wald χ2 (3) = 18.91; p < .001], for Treatment [Wald χ2 (2) = 8.63; p < .051], and for Treatment X Time [Wald χ2 (6) = 34.04; p < .051]. Post-hoc simple chi-square tests indicated that the only between-treatment differences occurred at posttreatment; NS participants were more likely to attend at least one AA meeting than were those in the other conditions. Rates of any attendance in AA declined in all conditions from posttreatment through 27 months.
