Factors Affecting the Outcomes of Patient's Suffering from Chronic Subdural Hematoma after Surgery by Burr-hole Hole-Drainage Method; a Cross Sectional Survey

Introduction & Chronic subdural hematoma (CSDH) is a common disease and consists of bleeding in the intracranial space. Trauma is the most common cause of CSDH. The present study is designed to determine factors associated with the outcomes of patients suffering from CSDH after surgery by Burr hole- drainage method. Through a prospective cross sectional study, all 59 patients with CSDH, who had been hospitalized in the Neurosurgery Department of Besat Hospital, in Sanandaj, Iran between 2008-2009, were recruited. A check list was prepared and data was gathered by interview and referring to patients’ hospital records. Patients were divided into four groups according to Odom and Finney outcome scale and then were further divided into two groups for easier analysis. T test, Chi square, Fisher exact test, and Logistic Regression via SPSS version 17 was used for analyses. Of 59 patients recruited, 51 (86.4%) were male. The mean age (± standard deviations) of patient's was 62.0±19.9 years. No statistical correlation was found between the time interval of the previous trauma to surgery, preoperative hospitalization, hematoma bloody content, drain anatomic site, recurrence signs in CT scan, recurrence treatment and patient’s outcomes (P>0.05). However, patient's age (elderly), sex (female), anticoagulatory drugs consumption, duration in which drain was kept within the hematoma cavity, presence of postoperative medical and surgical complications, GCS at hospitalization and at discharge and one month after discharge,risk factors and underlying medical conditions had significant relationships with the patient's outcomes (P