Efficacy of a smoking cessation intervention using the AHCPR guideline tailored for Koreans: a randomized controlled trial

This study was undertaken to evaluate a tailored smoking cessation intervention, which is applicable to Korean culture, using the Agency for Health Care Policy and Research (AHCPR) guideline. On-site counselors provided brief nurse-assisted smoking cessation counseling, including follow-up telephone support, to prevent a relapse in 200 randomly assigned smoking patients. These patients were referred by their physicians regardless of their willingness in smoking cessation in the outpatient department at a university hospital. Nicotine replacement therapy was not provided. Another 201 patients served as a control. After 5 months, current smoking cessation was self-reported on the phone and validated later by a portable carbon monoxide analyzer. After 5 months, the participants in the intervention group were no more likely to quit smoking than the control group. A subgroup analysis by age showed that the intervention among 166 younger smokers (aged 49 or less) was significantly more likely to be effective {risk ratio = 5.76 [95% confidence interval (CI) 1.34-24.74]} than it was among 235 older smokers (aged 50 or more) [risk ratio = 1.03 (95% CI 0.53-1.99)]. This study suggests a smoking cessation intervention using the AHCPR guideline tailored for Koreans, is effective for assisting outpatients aged 49 or younger to quit smoking.