Underestimation of smoking rates in an east Asian population with crohn's disease

Sung Wook Hwang, Hyungil Seo, Gwang Un Kim, Eun Mi Song, Myeongsook Seo, Sang Hyoung Park, Eunja Kwon, Ho Su Lee, Dong Hoon Yang, Kyung Jo Kim, Byong Duk Ye, Jeong Sik Byeon, Seung Jae Myung, Jin Ho Kim, Suk Kyun Yang

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


Background/Aims: The reported rates of current smoking at the time of Crohn's disease (CD) diagnosis tend to be low in East Asian studies. However, we hypothesized that East Asian patients may be reluctant to disclose their smoking history, likely because of the influence of the Confucian culture. Methods: We prospectively re-evaluated the smoking status at diagnosis in 1,437 Korean CD patients whose smoking status had been reported in our previous study. Results: After re-evaluation, the current smokers at diagnosis increased from 388 patients (27.0%) to 445 patients (31.0%), indicating that 12.8% (57 of 445 patients) of the current smokers at diagnosis did not disclose their smoking status at their initial evaluation. The proportion of current smokers at diagnosis who had initially concealed their smoking status was significantly higher among the female patients (29.7%, 11/37) compared with the male patients (11.3%, 46/408) (p<0.005) and among the patients who were =18 years old at diagnosis (56.4%, 22/39) compared with the patients >18 years old at diagnosis (8.6%, 35/406) (p<0.001). Conclusions: Subgroups of Korean CD patients, particularly young patients and female patients, are reluctant to disclose their smoking history. Therefore, the suggestion that smoking is not a risk factor for the development of CD in East Asians should be made with caution.

Original languageEnglish
Pages (from-to)73-78
Number of pages6
JournalGut and Liver
Issue number1
StatePublished - Jan 2017


  • Age at diagnosis
  • Crohn disease
  • Sex
  • Smoking


Dive into the research topics of 'Underestimation of smoking rates in an east Asian population with crohn's disease'. Together they form a unique fingerprint.

Cite this