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Background and Aim: Deep vein thrombosis (DVT) is a condition that, in case of delay in diagnosis and treatment, can lead to serious complications like pulmonary embolism. Given the importance of assessment and identification of diseases in every community, the current study aimed at assessing the epidemiology of DVT patients in Birjand.

Materials and Methods: The present descriptive-analytical study was conducted on all DVT patients admitted to Birjand Vali-e-asr hospital between 2009 and 2014. A trained medical student completed each researcher-designed questionnaire. based on an intern’s history recording, a physician's orders ,and a nurse’s note. Then, the patients were called up demanding the status of the patient and disease complications, readmission ,or death. Finally, the obtained data was encoded and analyzed by SPSS(V: 18) at the significant level P<0.05.

Results: During the study period,263 patients with DVThad been hospitalized in Birjand Vali-e-asr hospital .Out of the patients, 50.2% were males. Mean age of the subjects was 55.84 ± 18.45 years. In 98.1% of the cases the lower extremity was involved. The most prevalent risk factor was immobilization and the least risk factor was family history of DVT. Regarding the relationship between DVT risk factors and sex only smoking cigarettes was both significant and more prevalent. During 5 years, 3.8% of the population had died due to DVT complications. Recurrent DVT in 6% and pulmonary emboli in 3.4% of the patients were diagnosed.

Conclusion: Given that the most common risk factor for DVT in our study was immobilization, prophylaxis is necessary in patients at high risk tin order to decrease occurrence possibility of DVT.