Webb 2013.
Methods |
Setting: community, USA Recruitment: community volunteers |
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Participants | 424 current smokers of ≥ 5 cpd, 57% female, average age 42 years, average cpd 19.7 | |
Interventions | Both groups received 2 priming phone calls explaining benefits of intervention and encouraging use of materials. In intervention, priming call explicitly stated materials were tailored ∙ 4 self‐help booklets with placebo tailoring, covering cigarette smoking, cessation, and relapse prevention, based on cognitive‐behavioural techniques ∙ 4 standard self‐help booklets covering same materials |
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Outcomes | 1 month sustained abstinence at 6 months Validation: CO ≤ 8 ppm for locals |
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Notes | ||
Risk of bias | ||
Bias | Authors' judgement | Support for judgement |
Random sequence generation (selection bias) | Unclear risk | Not specified |
Allocation concealment (selection bias) | Unclear risk | Not specified |
Blinding (performance bias and detection bias) All outcomes | Low risk | Biochemical validation used; interventions of similar intensities |
Incomplete outcome data (attrition bias) All outcomes | Low risk | 29% lost in intervention group, 25% lost in control group |