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Predictors and moderators of outcome in different brief interventions for smoking cessation in general medical
Severin Haug1, Christian Meyer, Sabina Ulbricht
1Ernst-Moritz-Arndt-University Greifswald, Institute of Epidemiology and Social Medicine, Greifswald, Germany. severin.haug@uni-greifswald.de
Objective:
To explore demographic-, health-, and smoking-related predictors and moderators of outcome in smokers who participated in two different brief smoking cessation interventions.
Methods:
Data were acquired using a quasi-randomized controlled trial that tested the efficacy of computer-generated tailored letters and physician-delivered brief advice against assessment only. Daily smokers (n=1499) were recruited from 34 general medical practices. We used Generalized Estimating Equation analyses to investigate the relationship between 6-month prolonged smoking abstinence assessed at 12-, 18-, and 24-month follow-ups and potential predictors and moderators.
Results:
Female gender (OR=1.49, 95% CI=1.01-2.19), higher level of education (OR=1.82, 95% CI=1.18-2.82), intention to quit smoking (OR=1.66, 95% CI=1.16-2.38), and smoking cessation self-efficacy (OR=1.30, 95% CI=1.03-1.64) were positively, nicotine dependence (OR=0.84, 95% CI=0.76-0.94) and the presence of a smoking partner (OR=0.60, 95% CI=0.42-0.85) were negatively associated with smoking abstinence. Compared to assessment only, physician advice was less effective for people without an intention to quit smoking and for unemployed.
Conclusion:
Smoking cessation interventions might be improved by tailoring them to demographic- and smoking-related variables which were identified as predictors in this study.
Practice Implications:
The results suggest that tailored letters are a more universally applicable brief intervention in general medical practice than physician advice.
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