Ramon 2013.
| Methods | Setting: Spain; smoking cessation outpatient clinics Recruitment: smokers attending smoking cessation outpatient clinics |
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| Participants | 600 smokers, 51.3% M, mean age 47.4, average cigs/day 25.3. Paticipants attended clinics to "receive medical assistance" ‐ they were interested in quitting | |
| Interventions | 1. Individual counselling: "seven individual sessions at 3, 5, 7, 10, 12, 24, and 52 weeks after the pre‐quit session." 2. Telephone counselling + Individual Counseling: "individual counselling interventions at weeks 3, 5, and 12 after the pre‐quit session, telephone counselling at weeks 7, 10, and 24, and a control session at the clinic at week 52." Sessions were between 15 and 20 mins |
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| Outcomes | Abstinence at 52 weeks (sustained from week 2 to 52) Validation: CO concentrations of < 10 ppm |
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| Notes | New for 2018 update Funding: "This study was supported by a grant from the Spanish Health Institute, Carlos III PI080418." Declarations of interest: several authors "have received honoraria for conferences from manufacturers of smoking cessation products." |
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| Risk of bias | ||
| Bias | Authors' judgement | Support for judgement |
| Random sequence generation (selection bias) | Low risk | Quote: "used a computer‐generated randomization system based on a permuted block randomization list where each block was used by one centre. An independent researcher in the coordination centre generated a random sequence, and centres were informed about smoker allocation after consent to participation during the pre‐quit session." |
| Allocation concealment (selection bias) | Low risk | Quote: "used a computer‐generated randomization system based on a permuted block randomization list where each block was used by one centre. An independent researcher in the coordination centre generated a random sequence, and centres were informed about smoker allocation after consent to participation during the pre‐quit session." |
| Blinding of outcome assessment (detection bias) All outcomes | Low risk | Used biochemical verification to validate self‐reported outcome |
| Incomplete outcome data (attrition bias) All outcomes | Low risk | Attrition was around 20% and comparable across arms |