Size, consistency, and stability of stage effects for smoking cessation.
In the transtheoretical model (TTM), the stage effect is one of the most important determinants of health behavior change. Randomly assigned to 1 of 11 treatment conditions were 4653 smokers. A total of 66 stage effects were possible with 6 for each of the 11 treatment groups. The results suggest that brief stage-matched interventions that help populations progress one stage could produce 75% more abstinence. Interventions that help populations progress two stages could produce 300% more abstinence. The results also support the importance of replicating the stage effects across treatment conditions and over time.
Prochaska
James O
JO
University of Rhode Island, 2 Chafee Road, Kingston, RI 02881, USA. jop@uri.edu
Velicer
Wayne F
WF
Prochaska
Janice M
JM
Johnson
Janet L
JL
D000328:Adult; D003657:Decision Making; D005260:Female; D015438:Health Behavior; D006801:Humans; D008297:Male; D008962:Models, Theoretical; D016540:Smoking Cessation / Q000379:methods*; D000074606:Smoking Prevention; D016896:Treatment Outcome