Purpose: The purpose of this study is to investigate the trends of C-class and clinical departments, which are commonly used in clinical practice, to verify classification accuracy, and to provide preventive data through them. Method: This study is conducted on outpatients who visited one of clinic in Busan for 1 year. A Chi-square test is performed to examine the relationship between the clinical classification of patients and actual reflux diagnosis. In addition, a linear by linear analysis is performed to verify the tendency. Result: As a result, the study found that the proportion of middle-aged women was high in diagnosing varicose veins. In addition, as the C-class increased, the proportion of varicose vein reflux diagnosis tended to statistically significant increase (Test for trend=4.822, p＜.05). Conclusion: When it comes to the diagnosis of CVD, it seems reasonable to apply the C-class to Koreans. Generally, there would be a tendency that perception of C1 class is decreased. However, there was a relation between C1 and reflux of GSV or SSV more than 92%. (Ann Phlebology 2017;15:1-4)

Keywords: Varicose vein, CEAP, Clinical classification, Reflux