Table 2.

Intervention and control group abstinence percentages at 3, 6, and 12 mo postrandomization by self-report and validated by cotinine

Intervention (n = 147)Control (n = 155)
Self-reportCotinine validatedSelf-reportCotinine validated
7-d point prevalence
    3 mo27.917.72.61.9
    6 mo21.814.35.84.5
    12 mo19.112.29.07.1
Prolonged abstinence
    3 mo19.115.71.31.3
    6 mo16.312.900
    12 mo10.28.800

NOTE: All P values comparing intervention with control groups were <0.02 except for 12-month, cotinine-validated 7-day point prevalence abstinence comparison (P = 0.13).