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Asia Pac Psychiatry. 2013 Sep;5(3):197-204. doi: 10.1111/j.1758-5872.2012.00175.x. Epub 2012 Apr 11.

Predictors of success at six-month follow-up at a public smoking cessation clinic in South Korea.

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Department of Psychiatry, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea.



Our objective was to identify the factors related to returning to smoking by analyzing data obtained from a smoking cessation clinic.


We analyzed data from 2,089 subjects (age 44.0 ± 12.9 years) who started a smoking cessation program between 16 July 2007 and 31 December 2008 in a community health center in the city of Ulsan. We analyzed demographic information and clinical variables using Kaplan-Meier survival analysis and calculated the hazard ratio for returning to smoking.


Mean abstinence time differed according to the following factors: sex, past attempts to quit, employment status, type of health insurance, CO levels, results from Fagerstrom test for nicotine dependence (FTND), number of cigarettes smoked daily, use of a nicotine replacement, and number of contacts in the program. Using multivariate analysis, we identified negative relationships between treatment intensity and hazard ratio for the following: visits ≤4 (Exp(B) = 3.752, P < 0.001, reference: 5 visits ≤), telephone contacts ≤5 (Exp(B) = 10.528, P < 0.001, reference: 6 calls ≤) and SMS ≤ 20 (Exp(B) = 3.821, P < 0.001 in 0-10 group; Exp(B) = 1.407, P = 0.003 for the 11-20 group; reference: 21 messages ≤).


Type of insurance, baseline CO, FTND level, and intensity of smoking cessation intervention positively affects outcomes in a smoking cessation clinic. A cost-effectiveness study on the intensity of interventions in smoking cessation clinics is needed.


South Korea; public health; smoking; smoking cessation predictor; tobacco

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