Summary of 203 meningioma patients who underwent preoperative embolization

	Group 1	Group 2
	(N = 75)	(N = 128)
Interval between embolization and surgery (mean)	1–7 days (2.1 days)	8–26 days (9.9 days)
Total blood loss (mL)	897	987	NS
During removal of tumor (mL)	534	424	NS
Blood transfusion (U)	1.0–9.0	1.0–6.0
Mean (U)	2.9	2.1	NS
Tumor consistency at surgery
Hard	50	31	}P < .01
Moderately hard	20	75
Soft	5	22
Simpson grade	2.60	1.91	P < .01

Note:— NS indicates not significant