Surgery for chronic subdural hematoma in nonagenarians: A Scandinavian population-based multicenter study

Objective: Chronic subdural hematoma (cSDH) is a prevalent condition often seen in the elderly, with surgery being the treatment of choice when symptomatic. So far, few have explored the surgical outcomes in patients 90 years or older. The aim of this study was to investigate outcome after cSDH surgery in nonagenarians (>= 90 y/o group) compared to younger adult patients (< 90 y/o group). Materials: In a Scandinavian population-based cohort we conducted a retrospective review of 1,254 patients undergoing primary burr--hole procedures for cSDH between January 1, 2005 and December 31, 2010 at three neurosurgical centers. In a comparative analysis, the primary end-point was difference in hematoma recurrence rates between the >= 90 y/o and < 90 y/o groups. The secondary end-points were differences in perioperative morbidity and mortality between groups. Results: 75 patients were 90 years or older. There was no significant difference in recurrences resulting in reoperation between the age groups (10.7% vs 13.6%, P=. 47). There was also no significant difference in overall complication rate (4.1% vs 8.1%, P=. 21) or severe complications (1.4% vs 2.0%, P=. 68). There were three (4.0%) perioperative deaths within 30 days in the >= 90 y/o group and 40 (3.4%) in the < 90 y/o group (P=. 78). Conclusion: Patients 90 years or older had similar rates of recurrence, perioperative morbidity and perioperative mortality as compared to younger patients. Age alone should not be a contraindication for surgery in patients with cSDH.