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  • Title: Short-term benefit of smoking cessation in patients with coronary heart disease: estimates based on self-reported smoking data and serum cotinine measurements.
    Author: Twardella D, Küpper-Nybelen J, Rothenbacher D, Hahmann H, Wüsten B, Brenner H.
    Journal: Eur Heart J; 2004 Dec; 25(23):2101-8. PubMed ID: 15571825.
    Abstract:
    AIMS: To assess the short-term impact of smoking and smoking cessation measured by self-report and by serum cotinine on the risk of secondary cardiovascular disease events (CVD events). METHODS AND RESULTS: Cohort study among participants of an in-patient 3-week rehabilitation programme following an acute coronary syndrome or coronary artery revascularization. Smoking status at baseline was assessed by self-report (beginning of the rehabilitation programme, rehab) and serum cotinine (end of rehab). Active follow-up was conducted one year later. Subsequent CVD events were observed in 139 of the 967 patients. Both self-reported smoking status (odds ratio (OR) compared to continued smokers: recent quitters 0.96, former smokers 0.83, never smokers 0.54, p for trend 0.04) and serum cotinine (OR 0.59 (95% confidence interval (CI) 0.36-0.97) for cotinine-negative compared to cotinine-positive subjects) were associated with the occurrence of a secondary CVD event. After reclassification of all cotinine-positive subjects to continued smokers and cotinine-negative self-reported smokers to recent quitters, this association became even stronger. The OR now reached 0.71 (95% CI interval 0.38-1.33) for recent quitters, 0.64 (0.36-1.11) for former smokers and 0.44 (0.24-0.81) for never smokers (p-value for trend=0.009). CONCLUSION: The benefits of non-smoking and smoking cessation in cardiac patients are beyond controversy and might even be larger than suggested by previous studies which exclusively relied on self-reported smoking status.
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