FCCC LOGO Faculty Publications
Hill HA , Schoenbach VJ , Kleinbaum DG , Strecher VJ , Orleans CT , Gebski VJ , Kaplan BH
A Longitudinal Analysis of Predictors of Quitting Smoking among Participants in a Self-Help Intervention Trial
Addictive Behaviors. 1994 Mar-Apr;19(2) :159-173
PMID: ISI:A1994NH28200005   
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Predictors of 7-day abstinence from smoking were identified among participants in a randomized self-help smoking-cessation intervention trial conducted from 1985 to 1988 in Seattle, WA. Subjects were adult smokers belonging to a health maintenance organization who responded to an offer of free quitting assistance. Self-reported smoking status was assessed at 8, 16, and 24 months following enrollment. Predictors of abstinence were identified by longitudinal data analysis using Generalized Estimating Equations (GEEs), a modeling approach which handles repeated-measures data and accommodates time-dependent as well as time-independent covariates. Seventeen items emerged as significant (p < .05) predictors, with odds ratios ranging from 1.3 to 2.1. While much of the previous work in smoking- cessation research has focused on demographic and smoking history variables, results of this study indicate that emphasis should also be placed on psychosocial/motivational factors and quitting activities as important predictors of abstinence. Longitudinal data analysis represents a powerful technique for handling correlated (repeated measures) data, which may prove very useful for future studies of smoking cessation as well as other dynamic processes.
English Article NH282 ADDICT BEHAV