Predictors of recurrence and reintervention in non-acute subdural hematoma: A multimodal analysis of radiological, clinical, surgical, and endovascular factors.

Hematomas were managed with surgery alone, combined surgery and middle meningeal artery embolization, or embolization alone.

Recurrence occurred in 51 hematomas (20.6%) and reintervention in 44 (17.8%).

Combined surgery with embolization was associated with reduced recurrence (OR 0.44, 95% CI 0.22-0.88).

Among surgical variables, post-drain pneumocephalus significantly increased recurrence risk (OR 13.32, 95% CI 2.83-62.65), whereas longer durostomy drainage duration reduced the recurrence (OR 0.51, 95% CI 0.30-0.85).