Delayed Onset Postoperative Spinal Epidural Hematoma after Lumbar Spinal Surgery: Incidence, Risk Factors, and Clinical Outcomes

Table 3

Clinical presentation.

	Group A (early onset)	Group B (delayed onset)
Onset (h)			<0.05
Time from onset to evacuation (h)			0.009
Symptoms
Dysesthesias (%)	15 (30.6%)	5 (23.8%)	0.58
Pain (%)	5 (10.2%)	1 (4.8%)
Muscle weakness (%)	29 (59.2%)	15 (71.4%)
JOA score
Admission			0.18
Discharge			0.039

Values in bold indicates value < 0.05, which is considered as significance difference.