J Med Assoc Thai 2008; 91 (4):551

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Potential Effectiveness of Health Warning Labels among Employees in Thailand
Silpasuwan P Mail, Ngoenwiwatkul Y , Viwatwongkasem C , Satitvipawee P , Sirichotiratana N , Sujirarat D

Objective: Explore and investigate the perceptions and responses of employees regarding the effects of a
Health Warning Label (HWL) on their decision to encourage quitting and stages of change in smoking
behavior.

Material and Method: One thousand six hundred thirty seven employees in workplaces from four regions,
including Bangkok city, were studied during the year 2005-2006. Six hundred nine employees (both non- or
cigarette smokers) were part of a cohort study using qualitative and quantitative approaches. Questionnaires
were used to sample the cohort twice and two individuals per factory were interviewed in-depth.

Results:
The New-HWL that made the best impression was the “cancer caused by cigarette smoking” and 3.8%
stopped smoking after seeing the New-HWL. Moreover, New-HWL increased employees “pro” attitudes about
smoking cessation. Decisional balance that reflected different “con” to quit, among non-quitting and quitting
smokers.

Conclusion:
New-HWL significantly increased attitudes about smoking cessation.

Keywords: Potential Effectiveness, Health Warning Label, Employee

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