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Table 4 Prevalence ratio and 95% confidence interval for smoking habits

From: Relationship between Work Hours and Smoking Behaviors in Korean Male Wage Workers

  Weekly work hours Smoking in 2008 Continuous smoking§ Smoking cessation Start smoking¶
(n=2044) (n=1135) (n=1135) (n=909)
Model 1** Short* 1.39(1.17-1.65) 1.00(0.90-1.10) 1.00(0.52-1.91) 1.53(0.88-2.66)
  Reference† 1 1 1 1
  Long‡ 1.11(1.03-1.19) 1.01(0.96-1.06) 0.93(0.67-1.30) 1.02(0.78-1.34)
Model 2†† Short 1.20(1.01-1.42) 0.99(0.89-1.10) 1.06(0.55-2.05) 1.37(0.78-2.43)
  Reference 1 1 1 1
  Long 1.00(0.88-1.11) 1.00(0.96-1.05) 0.98(0.71-1.37) 0.96(0.73-1.27)
Model 3‡‡ Short 1.11(0.94-1.31) 0.97(0.88-1.08) 1.26(0.63-2.53) 1.36(0.75-2.47)
  Reference 1 1 1 1
  Long 0.95(0.84-1.06) 0.99(0.94-1.04) 1.06(0.75-1.48) 0.95(0.72-1.26)
  1. *Weekly work hours more than 35, †Weekly work hours 35 or more, less than 52, ‡Weekly work hours more than 52, §Smokers in 2008/smokers in 2007, Adults quitting smoking in 2008/smokers in 2007, ¶Smokers in 2008/non-smokers in 2007, **Model 1:adjusted for age, ††Model 2: adjusted for age, education, and marital status, ‡‡Model 3:adjusted for age, education, marital status, occupation, precarious work, tenure, shiftwork, job satisfaction, and alcohol consumption.