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Editor,—Smoke free workplaces have been found to reduce cigarette consumption among smokers1-4 and smoking prevalence.1 4 5 In countries with a high smoking prevalence such as Japan (men, 55%),6 a total ban is unusual but policies such as limiting smoking to designated smoking areas are common.7 However, the impact of such restrictions on smoking has been weak.4 8 9 Furthermore, evidence linking restrictive policies to smoker motivation to quit is limited.4 5 The present study therefore examined the relation between common workplace restrictions on smoking, and smoking behaviour and attitudes toward quitting in Japan.
A health survey using self administered questionnaires was conducted among a random sample of employees of a municipal office in Japan.10 A response rate of 89% was obtained. The present study analysed data from …