Alcohol abstinence self-efficacy over time was analyzed using mixed models as described above. Results showed no main effect for Treatment [F (2, 445) = .85], a significant main effect for Time [F (3, 445 = 56.35; p < .001], and a significant Treatment X Time interaction [F (6, 445) = 2.91; p < .01]. Self-efficacy increased over time in all three treatment conditions, but the increase for NS patients was much steeper from months 15 through 27 than in the other conditions (see Figure 5, panel A).
