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Initial evaluation of a real-world Internet smoking cessation system
Nathan K Cobb1, Amanda L Graham, Beth C Bock
1Beth Israel Deaconess Medical Center/Harvard University School of Medicine, Boston, MA, USA.
Summary
Internet smoking cessation programs can be effective, with sustained use of social support features significantly increasing abstinence rates. Further research is needed to overcome evaluation challenges for these widely accessible interventions.
Area of Science:
- Public Health
- Behavioral Science
- Digital Health
Background:
- Reducing smoking prevalence requires cost-effective and widely accessible treatments.
- The internet offers a scalable platform for delivering smoking cessation interventions.
- Limited evaluation data exists for many online smoking cessation programs.
Purpose of the Study:
- To evaluate the efficacy of a large-scale, globally used smoking cessation website (QuitNet).
- To identify challenges and limitations in evaluating web-based interventions.
- To explore process-to-outcome mechanisms for internet-based smoking cessation.
Main Methods:
- A preliminary, large-scale evaluation of QuitNet using survey data from 1,501 registrants.
- Assessment of 7-day point prevalence abstinence 3 months post-registration.
- Intention-to-treat analysis considering baseline quitters and response rates (25.6%).
Main Results:
- Excluding baseline quitters, intention-to-treat analysis showed 7% point prevalence abstinence.
- Among responders only, 30% achieved point prevalence abstinence.
- Sustained QuitNet use, particularly social support features, tripled point prevalence abstinence and quadrupled continuous abstinence.
Conclusions:
- Internet-based smoking cessation programs show potential public health impact.
- Web-based evaluations present significant design and methodological challenges.
- Social support features within online platforms are key drivers of smoking cessation success.