Article

International Journal of Behavioral Medicine

, Volume 20, Issue 3, pp 444-449

Open Access This content is freely available online to anyone, anywhere at any time.

Development of a Smoking Abstinence Self-efficacy Questionnaire

  • Viola SpekAffiliated withCentre of Research on Psychology in Somatic diseases (CoRPS), Tilburg University
  • , Fieke LemmensAffiliated withDepartment of Medical Psychology, Máxima Medical Centre Veldhoven
  • , Marlène ChatrouAffiliated withDepartment of Medical Psychology, Máxima Medical Centre Veldhoven
  • , Suzanne van KempenAffiliated withDepartment of Medical Psychology, Máxima Medical Centre Veldhoven
  • , François PouwerAffiliated withCentre of Research on Psychology in Somatic diseases (CoRPS), Tilburg University
  • , Victor PopAffiliated withCentre of Research on Psychology in Somatic diseases (CoRPS), Tilburg UniversityDepartment of Medical Psychology, CoRPS - Centre for Research on Psychology in Somatic diseases, Tilburg University Email author 

Abstract

Background

Self-efficacy beliefs are an important determinant of (changes in) health behaviors. In the area of smoking cessation, there is a need for a short, feasible, and validated questionnaire measuring self-efficacy beliefs regarding smoking cessation.

Purpose

The purpose of this study is to investigate the psychometric properties of a six-item questionnaire to assess smoking cessation self-efficacy.

Methods

We used longitudinal data from a smoking cessation study. A total of 513 smokers completed the Smoking Abstinence Self-efficacy Questionnaire (SASEQ) and questionnaires assessing depressive symptoms and motivation to quit smoking. After that, they set a quit date and attempted to stop smoking. One year after the quit date, smoking status of participants was assessed by self report. The psychometric properties of the SASEQ were studied and we investigated whether SASEQ scores predicted successful smoking cessation.

Results

Factor analysis yielded one factor, with an Eigenvalue of 3.83, explaining 64% of variance. All factor loadings were ≥0.73. We found a Cronbach’s alpha of 0.89 for the SASEQ, low correlations for the SASEQ with depressive symptoms, and motivation to quit, indicating that self-efficacy is measured independently of these concepts. Furthermore, high baseline SASEQ scores significantly predicted smoking abstinence at 52 weeks after the quit date (OR = 1.85; 95% CI = 1.20~2.84).

Conclusions

The SASEQ appeared to be a short, reliable, and valid questionnaire to assess self-efficacy beliefs regarding smoking abstinence. In the present study, this instrument also had good predictive validity. The short SASEQ can easily be used in busy clinical practice to guide smoking cessation interventions.

Keywords

Self-efficacy Smoking Abstinence Psychometric Properties