From: Predictors of acute intracranial hemorrhage and recurrence of chronic subdural hematoma following burr hole drainage
Risk factors
OR
95% CI
P value
Headache
3.053
1.181–7.890
0.021
Preoperative maximal thickness
0.543
0.219–1.351
0.189
Intraoperative irrigation
0.289
0.114–0.735
0.009