Clinical characteristics and risk factors of intracranial hemorrhage after spinal surgery

Table 2 Analysis of surgery-related risk factors in the two groups, n (%)

	Hemorrhage group, n = 6	Control group, n = 30	P value
Surgery time (min)	177.50 ± 50.97	149.67 ± 69.06	0.357
Blood loss during surgery (mL)	433.33 ± 350.24	327.67 ± 301.94	0.451
Max systolic BP (mmHg)	150.00 ± 22.14	139.47 ± 27.34	0.381
Fluctuating systolic BP (mmHg)	47.50 ± 16.66	39.00 ± 17.49	0.282
Dura damage	3 (50.0)	1 (3.3)	0.010a
Fusion instrument	4 (66.7)	10 (33.3)	0.181
Pedicle screw fixation	4 (66.7)	23 (76.7)	0.627
Plasma transfusion (mL)	633.33 ± 898.15	20.00 ± 109.55	0.155
RBC transfusion (U)	2.00 ± 2.53	0.20 ± 0.81	0.143
Subfascial drainage (mL)	1804.83 ± 1284.60	695.33 ± 507.85	0.088

^aP < 0.05.

BP: Blood pressure; RBC: Red blood cell.