A bidirectional path analysis model of smoking cessation self‐efficacy and concurrent smoking status: impact on abstinence outcomes. (8th August 2018) - Clyde, Matthew
Abstract: Self‐efficacy is routinely associated with abstinence in the addictions literature, and is a major component relapse‐prevention models. The magnitude of this relationship has been brought into question following equivocal results in studies controlling for concurrent smoking status. The aim of our study was to clarify the relationship between cessation self‐efficacy, smoking status, and cessation outcomes in a cohort of treatment‐seeking smokers. Smokers participating in the FLEX trial, a randomized trial investigating the efficacy of three pharmacologic treatments for smoking cessation, completed questionnaires assessing cessation self‐efficacy at baseline and at weeks 1, 3, 5 and 10 post‐target quit date; smoking status was verified using expired carbon monoxide. Structural models were fit in order to ascertain the relationship between cessation self‐efficacy and concurrent smoking at each time‐point, and to assess the association between cessation self‐efficacy, smoking and seven‐day point prevalence smoking status at week 10. A total of 737 treatment‐seeking smokers participated. In our path model, self‐efficacy and smoking status at all time points were associated with week 10 abstinence (except week 3 self‐efficacy), after controlling these values' previous time‐points. All direct pathways between cessation self‐efficacy and smoking were also significant, supporting a bidirectional relationship. Our results support a bidirectional and reciprocal relationship between cessation self‐efficacy and concurrent smoking behavior; participants with higher confidence were more likely to be smoke‐free, and concurrent smoking status predicted levels of confidence over the ensuing weeks. Both measures were associated with week 10 abstinence. Our results indicate that while correlated, both cessation self‐efficacy and current smoking behavior during a cessation attempt are important independent markers of ultimate cessation success. Abstract : Self‐efficacy is a strong predictor of outcomes in the addictions literature but has been questioned as either being a cause or reflection of behaviour change. Using path analyses, we demonstrate a bidirectional and reciprocal relationship between smoking cessation self‐efficacy and smoking behaviour during the treatment phase of a randomized control trial. Changes for both self‐efficacy and smoking affected subsequent scores, with scores on both measures associated with cessation outcomes at week 10.