Susan A Flocke1,2,3, Mary M Step4, Peter J Lawson5, Samantha Smith6, Stephen J Zyzanski1,2,3. 1. Department of Family Medicine and Community Health, Case Western Reserve University School of Medicine, Cleveland, OH. 2. Department of Epidemiology & Biostatistics, Case Western Reserve University School of Medicine, Cleveland, OH. 3. Case Comprehensive Cancer Center, Cleveland, OH. 4. Department of Social and Behavioral Sciences, College of Public Health, Kent State University, Kent, OH. 5. Department of Operations Research and Analytics, Metro Health Hospital System, Cleveland, OH. 6. Department of Epidemiology, Surveillance and Informatics, Cuyahoga County Board of Health, Parma, OH.
Abstract
INTRODUCTION: A reliable measure capable of detecting progression towards smoking cessation would be valuable for evaluating and optimizing the effectiveness of low- to moderate-intensity cessation interventions, such as brief advice in the primary care setting. This article presents the development and evaluation of a brief self-report measure of Incremental Behavior Change toward Smoking cessation (IBC-S). METHODS: Sequential samples of 411 and 399 adult smokers completed items representing a spectrum of behavioral and cognitive changes antecedent to smoking cessation. The dimensionality, fit, range of difficulty, and reliability of items were evaluated using factor analysis and Rasch modeling. RESULTS: The final 15-item IBC-S measure met fit criteria and demonstrated acceptable reliability. Participants with a significant change in IBC-S score were over four times more likely to report cessation at 6-week follow-up (OR 4.37, 95% CI 1.83-10.42). CONCLUSION: The IBC-S is brief, reliable and associated with self-report of smoking reduction and cessation. IMPLICATIONS: This article presents the psychometric evaluation of a measure to assess a spectrum of behaviors and cognitions antecedent to smoking cessation. The findings indicate that the items show good measurement properties and good potential as a sensitive measure to evaluate interventions. This measure provides an alternative outcome for interventions that are designed to move individuals towards cessation attempts.
INTRODUCTION: A reliable measure capable of detecting progression towards smoking cessation would be valuable for evaluating and optimizing the effectiveness of low- to moderate-intensity cessation interventions, such as brief advice in the primary care setting. This article presents the development and evaluation of a brief self-report measure of Incremental Behavior Change toward Smoking cessation (IBC-S). METHODS: Sequential samples of 411 and 399 adult smokers completed items representing a spectrum of behavioral and cognitive changes antecedent to smoking cessation. The dimensionality, fit, range of difficulty, and reliability of items were evaluated using factor analysis and Rasch modeling. RESULTS: The final 15-item IBC-S measure met fit criteria and demonstrated acceptable reliability. Participants with a significant change in IBC-S score were over four times more likely to report cessation at 6-week follow-up (OR 4.37, 95% CI 1.83-10.42). CONCLUSION: The IBC-S is brief, reliable and associated with self-report of smoking reduction and cessation. IMPLICATIONS: This article presents the psychometric evaluation of a measure to assess a spectrum of behaviors and cognitions antecedent to smoking cessation. The findings indicate that the items show good measurement properties and good potential as a sensitive measure to evaluate interventions. This measure provides an alternative outcome for interventions that are designed to move individuals towards cessation attempts.
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