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Fidelity issues in secondhand smoking interventions for children.

Marilyn Johnson-Kozlow1, Melbourne F Hovell, Liza S Rovniak

  • 1San Diego State University, San Diego, CA 92123, USA. mfjohnson@projects.sdsu.edu

Nicotine & Tobacco Research : Official Journal of the Society for Research on Nicotine and Tobacco
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Summary

Higher treatment fidelity in secondhand smoke (SHS) interventions for children is linked to statistically significant results. Improving SHS intervention fidelity is crucial for effective public health programs.

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Area of Science:

  • Public Health
  • Behavioral Science
  • Intervention Research

Background:

  • Secondhand smoke (SHS) exposure poses significant risks to children's health.
  • Intervention studies aim to reduce SHS exposure in homes, but their effectiveness can be influenced by fidelity.
  • Evaluating methodological and theoretical fidelity is essential for understanding intervention success.

Purpose of the Study:

  • To review and evaluate the methodological and theoretical fidelity of SHS intervention studies targeting children in their homes.
  • To assess the relationship between treatment fidelity and study outcomes.
  • To suggest improvements for fidelity evaluation guidelines.

Main Methods:

  • A systematic review of 29 SHS intervention studies was conducted.
  • Interventions were evaluated using guidelines from the National Institutes of Health Behavior Change Consortium.
  • Treatment fidelity was assessed based on criteria met, with inter-rater reliability at 0.78.

Main Results:

  • Studies with higher treatment fidelity were more likely to yield statistically significant results (0.74 vs. 0.50 average fidelity).
  • Higher fidelity was associated with more recent studies, efficacy trials, intensive interventions, US-based trials, and those with a theoretical basis.
  • Treatment fidelity remained the only significant predictor of study outcome after accounting for other variables (p = .052).

Conclusions:

  • Enhancing methodological and theoretical fidelity in SHS interventions is critical for identifying effective public health strategies.
  • Improvements in fidelity evaluation guidelines, including theoretical fidelity, are recommended.
  • Higher fidelity interventions are more likely to demonstrate positive and significant outcomes in protecting children from secondhand smoke.