title: Can recurrence of chronic subdural hematoma be predicted? A retrospective analysis of 292 cases.
abstract: BACKGROUND
  Chronic subdural hematomas are the most common type of intracranial hemorrhage among the elderly. There is a substantial recurrence rate after evacuation by burr-hole surgery. In this study, we aimed to determine the predictors of recurrence after single burr-hole evacuation of chronic subdural hematomas.
  
  
  METHODS
  We retrospectively analyzed 292 consecutive patients with chronic subdural hematoma. Clinical parameters, anamnesis, and previous anticoagulant drug use have been evaluated with univariate and multivariate analyses to determine predictors associated with recurrence.
  
  
  RESULTS
  At least a second surgery was needed in 43 of 292 (14.7%) patients. We showed that recurrence rate was significantly higher in patients with bilateral subdural hematoma, after univariate and multivariate analyses (23.1% versus 11.4%). We did not find any significant relationship between recurrence rate and age, gender, hypertension, and/or diabetes mellitus in anamnesis, preceding head trauma, and time interval between trauma and the operation, previous anticoagulant, and/or antiaggregant therapy.
  
  
  CONCLUSIONS
  After analysis of all evaluated factors, only bilateral hematoma was found correlated with high recurrence rate (p = 0.01), probably due to previous brain atrophy or existing coagulopathy.
authors: Department of Neurosurgery, Bakirkoy Research and Training Hospital for Neurology, Neurosurgery, and Psychiatry, İstanbul, Turkey.
authors: Bekir
authors: B
authors: Tugcu
authors: Department of Neurosurgery, Erzurum Research and Training Hospital, Erzurum, Turkey.
authors: Osman
authors: O
authors: Tanriverdi
authors: Department of Neurosurgery, Bakirkoy Research and Training Hospital for Neurology, Neurosurgery, and Psychiatry, İstanbul, Turkey.
authors: Serhat
authors: S
authors: Baydin
authors: Department of Neurosurgery, Bakirkoy Research and Training Hospital for Neurology, Neurosurgery, and Psychiatry, İstanbul, Turkey.
authors: Batu
authors: B
authors: Hergunsel
authors: Department of Neurosurgery, Bakirkoy Research and Training Hospital for Neurology, Neurosurgery, and Psychiatry, İstanbul, Turkey.
authors: Ömür
authors: Ö
authors: Günaldı
authors: Department of Neurosurgery, Bakirkoy Research and Training Hospital for Neurology, Neurosurgery, and Psychiatry, İstanbul, Turkey.
authors: Ender
authors: E
authors: Ofluoglu
authors: Department of Neurosurgery, Kanuni Sultan Suleyman Research and Training Hospital, İstanbul, Turkey.
authors: Ibrahim
authors: I
authors: Alatas
authors: Department of Neurosurgery, Bakirkoy Research and Training Hospital for Neurology, Neurosurgery, and Psychiatry, İstanbul, Turkey.
authors: Bulent
authors: B
authors: Demirgil
authors: Department of Neurosurgery, Bakirkoy Research and Training Hospital for Neurology, Neurosurgery, and Psychiatry, İstanbul, Turkey.
authors: Erhan
authors: E
authors: Emel
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002648:Child; D002675:Child, Preschool; D005260:Female; D020200:Hematoma, Subdural, Chronic / Q000175:diagnosis* / Q000601:surgery; D006801:Humans; D007223:Infant; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D012008:Recurrence; D012189:Retrospective Studies; D016896:Treatment Outcome; D014207:Trephining; D055815:Young Adult