Smoking Interventions in the General Population

Phase 2

• Conditions: Tobacco Smoking
• Interventions: Behavioral: Smoking abstinence oriented expert system intervention; Behavioral: Smoking reduction oriented expert system intervention

• Registration Number: NCT00678938
• Lead Sponsor: University Medicine Greifswald

Brief Summary

The study takes up two problems: 1) Little research exists about general population interventions for smokers not ready to quit within the foreseeable future. 2) There is little evidence for smoking reduction as a behavioural goal in interventions. Interventions based on the Transtheoretical Model of Behavior Change (TTM) using computer expert-system technology yield delayed and smaller effects in smokers in the precontemplation stage of change compared to smokers in more advanced stages of change. Reducing the number of cigarettes smoked per day is currently discussed as an intermediate goal for this subgroup. Epidemiological and clinical studies revealed that smokers are able to maintain a substantial reduction. No undermining effects with respect to smoking cessation have been found. However, there are no studies that test the efficacy of behavioural interventions for smoking reduction using population based recruitment. Objectives: Testing the efficacy of TTM based interventions for general population smokers not intending to quit smoking, i.e. a smoking-reduction and a smoking-cessation tailored intervention using computerized expert-system technology.

Detailed Description

Not available

Study Timeline

• Study Start: 2004-10
• Status Verified: 2008-05
• Study First Submitted: 2008-05-14
• Study First Submitted QC: 2008-05-14
• Last Update Submitted: 2008-05-14
• Study First Posted: 2008-05-16
• Last Update Posted: 2008-05-16
• Primary Completion: 2008-10
• Study Completion: 2008-10

Recruitment & Eligibility

• Status: UNKNOWN
• Sex: All
• Target Recruitment: 1462

Inclusion Criteria

• Daily smoking of 10 or more cigarettes
• No intention to quit within the next six month
• Age of 18 years and older
• valid telephone number

Exclusion Criteria

• Insufficient german language and cognitive capabilities to complete the assessment

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: FACTORIAL

Arm && Interventions

Group	Intervention	Description
1	Smoking abstinence oriented expert system intervention	-
2	Smoking reduction oriented expert system intervention	-

Primary Outcome Measures

Name	Time	Method
Point prevalence of tobacco abstinence	24 hours, 7 days, 4 weeks, 6 months preceeding the 12 and 24 month follow-up assessments

Secondary Outcome Measures

Name	Time	Method
number of quit and cutdown attempts	last 12 months preceeding follow-up assessment
number of Cigarettes smoked per day	4 weeks preceeding follow-up assessment
Stages of change progress	at 12 and 24 months follow-up