Objectives: Syndromes of venous hypertension and reduced venous clearance are important causes of morbidity and disability in patients with varicose venous disease. Published estimates of the prevalence of varicosities range from 7% to 55% in the adult population, with most studies demonstrating clinical varicose reflux in about 40% of the population where the frequency of venous insufficiency is believed to be higher in Westernized and industrialized nations, most likely due to differences in lifestyle and activity. Unfortunately, the prevalence in a Turkish population is not known. The goal of the VEYT-I study was to determine the characteristics of venous insufficiency in a Turkish population. Method: Randomized patients who applied to a health-care centre were included in this study. The Tübingen questionnaire was used to evaluate the signs and symptoms of venous insufficiency and their seriousness in a Turkish population. Patients were additionally questioned on demographic data, education, working, living habits, quality of life and actual health status. Results: A total of 2167 patients were involved in this study. Four patients with chronic renal failure and 40 patients with congestive heart failure were excluded. In patients with venous insufficiency, 90.1% did not receive any therapy. In all, 51.53% of patients with venous insufficiency were men, and mean age was 56.9 ± 9.4. Conclusion: The prevalence of venous insufficiency seems to be somewhat higher when compared with Western populations. One of the most prominent facts is that about 90% of patients with venous insufficiency did not receive any therapy. Therefore, disease-related complications or discomfort might emerge soon, and so more importance should be given to venous insufficiency. The VEYT-I study is a continuing database study and the target is to enlarge the study population.