Cessation and relapse in a year-long workplace quit-smoking contest.

In an attempt to increase the impact of smoking cessation activities, some recent studies have examined the use of contests and competitions. The study reported here evaluates a year-long multiple-lottery quit-smoking contest at Volvo Flygmotor, the Volvo aircraft engine manufacturing company in Trollhattan, Sweden. Lotteries were held at 1, 6, and 12 months after the contest began. By quitting for at least 1 month, enrollees were eligible to win cash prizes. Maintaining nonsmoking status from a previous lottery automatically qualified enrollees for the next one. Smoking status was established by self-report, expired carbon monoxide, and saliva cotinine. Seventy-three employees, representing approximately 10% of the company's smokers, entered the contest during the initial 2-week enrollment period. Point prevalence 1-month and 6-month cessation rates were 64.4 and 49.3%, respectively. Continuous abstinence 6-month and 1-year rates were 45.2 and 32.8% respectively. Psychological, home, work and smoking history variables generally were not related to cessation or relapse.