. 2024 Feb 18;14:4011. doi: 10.1038/s41598-024-54369-2

Table 3.

Comparison of post-SRS hemorrhage rates between bAVM volume groups, stratified by bAVM morphology.

bAVM volume	< 20 cm³	20–40 cm³	> 40 cm³	P value
All bAVMs, hemorrhage events/person-years (hemorrhage rate per 1000 person-years)	2/886.6 (2.3)	5/504.4 (9.9)	7/326.6 (21.4)	0.011
bAVM morphology	Hemorrhage events/person-years (hemorrhage rate per 1000 person-years)
Compact*	1/284.3 (3.5)	0/168.4 (0)	2/163.2 (12.3)	0.492
Diffuse	1/602.3 (1.7)	5/335.9 (14.9)	5/163.4 (30.6)	0.022^†

*Compact bAVM is defined as compactness index ≥ 0.63.

^†P < 0.05.