Chronic venous insufficiency’s frequency reaches almost 25% in European countries. The aim of this present study was to assess the correlation between sociodemographic characteristics as well as clinical findings and para-clinical findings of aCVI patients. A total number of 2636 patients diagnosed with CVI were evaluated for over an 8 year time period (2006-2013). In case of 795 of them, diagnosis of aCVI (C4-C6) has been established. The following variables have been evaluated: demographic data, etiology, risk factors, chronic diseases as risk factors, signs and symptoms, laboratory findings and even the therapeutic approach.All the assessed data has been evaluated using descriptive statistics, t-Student test, and chi square test. Also the relative risk (RR) and Odds ratio (OR) has been calculated. The mean age of aCVI patients was significantly higher (p=0.001) than the age of patients with stage C1-3 CVI. A positive correlation (p<0.0001) between combined venous disorders and clinical stage of CVI has been found. Deep vein thrombosis proved to be correlated (p=0.02) with evolution of CVI to venous ulcer (stage C6). Worsening of advanced venous insufficiency was also correlated with presence of peripheral arterial diseases, and/or metabolic diseases (p<0.0001, and p=0.02). Based on our results, the typical profile of a patient with aCVI has been outlined. Using this profile, the general practitioner and even the internal medicine specialist can recognize in advance patients with an elevated risk of developing aCVI, and accordingly can choose a more appropriate  therapeutic approach.  30