Bovet 2002.
| Methods | Setting: Seychelles Heart Study II Recruitment: age‐ and sex‐stratified sample drawn from general population of Mahé, invited by letter to a cardiovascular risk factor survey Selected: last 155 participants to the Seychelles Heart Study II who reported smoking. | |
| Participants | 155 smokers (defined as >= 1 cpd during previous week); mean age 46 years, 15% female, mean cpd: 11.9 Therapist: physician | |
| Interventions | Intervention: ultrasonography of carotid and femoral arteries + quit‐smoking counselling. Smokers with >= 1 plaque given 2 photographs of their plaque plus explanation. Control: quit‐smoking counselling | |
| Outcomes | Definition of abstinence: 7‐day abstinence Duration of follow‐up: 6 months Biochemical validation of non‐smokers: none (assessor blinded) | |
| Identification | ||
| Notes |
Source of funding: This study was supported by the Ministry of Health of Seychelles, the University Institute of Social and Preventive Medicine of Lausanne (Switzerland), and the Division of Cardiology of the University Hospital of Lausanne. P Bovet benefited from a grant from the Swiss National Science Foundation (No. 3233‐038792.93). F Paccaud benefited from a grant from the Swiss National Science Foundation (No. 3233‐038792.93). F Paccaud benefited from grants from the "Fondation Vaudoise de Cardiologie" and the "Fondation Emma Muschamp" (Switzerland). Sonotron Ltd (Switzer‐products) provided the echographic system for the study, and Air Seychelles transported this equipment free of charge. |
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| Risk of bias | ||
| Bias | Authors' judgement | Support for judgement |
| Random sequence generation (selection bias) | Low risk | Pre‐established random sequences of numbers matched to rank of arrival |
| Allocation concealment (selection bias) | Unclear risk | Unclear whether allocation was concealed or not |
| Blinding of outcome assessment (detection bias) All outcomes | Low risk | No biochemical validation, but follow‐up assessors blinded to allocation group |
| Incomplete outcome data (attrition bias) All outcomes | Low risk | 2 participants lost to follow‐up, not included for analysis |