Table 2.

Differences in enrollment, completion, and quit rates in incentive and control groups

Outcome measuresControl, N = 87Incentive, N = 92P
Enrollment, N (%)17 (19.5)38 (41.3)0.002
Number of classes attended
    Overall1.70.80.002
    Conditional on enrollment4.14.10.9
Program completion, N (%)
    Overall10 (11.5)23 (25)0.02
    Conditional on enrollment10 (58.8)23 (60.5)0.91
Confirmed quit—30 d, N (%)
    Overall4 (4.6)15 (16.3)0.01
    Conditional on enrollment4 (23.5)15 (39.5)0.25
Confirmed quit—6 mo, N (%)
    Overall4 (4.6)6 (6.5)0.57
    Conditional on enrollment4 (23.5)6 (15.8)0.49