Size, consistency, and stability of stage effects for smoking cessation
Date of Original Version
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. © 2003 Elsevier Ltd. All rights reserved.
Prochaska, James O., Wayne F. Velicer, Janice M. Prochaska, and Janet L. Johnson. "Size, consistency, and stability of stage effects for smoking cessation." Addictive Behaviors 29, 1 (2004): 207-213. doi:10.1016/S0306-4603(03)00086-8.