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Identifying effective intervention components for smoking cessation: a factorial screening experiment.

ABSTRACT: To identify promising intervention components intended to help smokers to attain and maintain abstinence in their quit smoking attempts.A fully crossed, six-factor randomized fractional factorial experiment.Eleven primary care clinics in southern Wisconsin, USA.A total of 637 adult smokers (55% women, 88% white) motivated to quit smoking who visited primary care clinics.Six intervention components designed to prepare smokers to quit, and achieve and maintain abstinence (i.e. for the preparation, cessation and maintenance phases of smoking treatment): (1) preparation nicotine patch versus none; (2) preparation nicotine gum versus none; (3) preparation counseling versus none; (4) intensive cessation in-person counseling versus minimal; (5) intensive cessation telephone counseling versus minimal; and (6) 16 versus 8?weeks of combination nicotine replacement therapy (nicotine patch ?+? nicotine gum).Seven-day self-reported point-prevalence abstinence at 16?weeks.Preparation counseling significantly improved week 16 abstinence rates (P = .04), while both forms of preparation nicotine replacement therapy interacted synergistically with intensive cessation in-person counseling (P?

SUBMITTER: Piper ME

PROVIDER: S-EPMC4699315 | biostudies-literature | 2016 Jan

REPOSITORIES: biostudies-literature

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Identifying effective intervention components for smoking cessation: a factorial screening experiment.

Piper Megan E ME Fiore Michael C MC Smith Stevens S SS Fraser David D Bolt Daniel M DM Collins Linda M LM Mermelstein Robin R Schlam Tanya R TR Cook Jessica W JW Jorenby Douglas E DE Loh Wei-Yin WY Baker Timothy B TB

Addiction (Abingdon, England) 20151119 1

<h4>Aims</h4>To identify promising intervention components intended to help smokers to attain and maintain abstinence in their quit smoking attempts.<h4>Design</h4>A fully crossed, six-factor randomized fractional factorial experiment.<h4>Setting</h4>Eleven primary care clinics in southern Wisconsin, USA.<h4>Participants</h4>A total of 637 adult smokers (55% women, 88% white) motivated to quit smoking who visited primary care clinics.<h4>Interventions</h4>Six intervention components designed to ...[more]

PMID: 26582269

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Project description:BACKGROUND:Smoking remains a leading cause of preventable death and illness. Internet interventions for smoking cessation have the potential to significantly impact public health, given their broad reach and proven effectiveness. Given the dose-response association between engagement and behavior change, identifying strategies to promote engagement is a priority across digital health interventions. Text messaging is a proven smoking cessation treatment modality and a powerful strategy to increase intervention engagement in other areas of health, but it has not been tested as an engagement strategy for a digital cessation intervention. OBJECTIVE:This study examined the impact of 4 experimental text message design factors on adult smokers' engagement with an internet smoking cessation program. METHODS:We conducted a 2×2×2×2 full factorial screening experiment wherein 864 participants were randomized to 1 of 16 experimental conditions after registering with a free internet smoking cessation program and enrolling in its automated text message program. Experimental factors were personalization (on/off), integration between the web and text message platforms (on/off), dynamic tailoring of intervention content based on user engagement (on/off), and message intensity (tapered vs abrupt drop-off). Primary outcomes were 3-month measures of engagement (ie, page views, time on site, and return visits to the website) as well as use of 6 interactive features of the internet program. All metrics were automatically tracked; there were no missing data. RESULTS:Main effects were detected for integration and dynamic tailoring. Integration significantly increased interactive feature use by participants, whereas dynamic tailoring increased the number of features used and page views. No main effects were found for message intensity or personalization alone, although several synergistic interactions with other experimental features were observed. Synergistic effects, when all experimental factors were active, resulted in the highest rates of interactive feature use and the greatest proportion of participants at high levels of engagement. Measured in terms of standardized mean differences (SMDs), effects on interactive feature use were highest for Build Support System (SMD 0.56; 95% CI 0.27 to 0.81), Choose Quit Smoking Aid (SMD 0.38; 95% CI 0.10 to 0.66), and Track Smoking Triggers (SMD 0.33; 95% CI 0.05 to 0.61). Among the engagement metrics, the largest effects were on overall feature utilization (SMD 0.33; 95% CI 0.06 to 0.59) and time on site (SMD 0.29; 95% CI 0.01 to 0.57). As no SMD >0.30 was observed for main effects on any outcome, results suggest that for some outcomes, the combined intervention was stronger than individual factors alone. CONCLUSIONS:This factorial experiment demonstrates the effectiveness of text messaging as a strategy to increase engagement with an internet smoking cessation intervention, resulting in greater overall intervention dose and greater exposure to the core components of tobacco dependence treatment that can promote abstinence. TRIAL REGISTRATION:ClinicalTrials.gov NCT02585206; https://clinicaltrials.gov/ct2/show/NCT02585206. INTERNATIONAL REGISTERED REPORT IDENTIFIER (IRRID):RR2-10.1136/bmjopen-2015-010687.

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Identifying effective intervention components for smoking cessation: a factorial screening experiment.

Publications

Identifying effective intervention components for smoking cessation: a factorial screening experiment.

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