Table 3:

Prospective hemorrhage rates in the literature^{^a}

Study	No. of Patients	No. of Lesions	Hemorrhage Assessment	Hemorrhage Rate without Prior Hemorrhage	Hemorrhage Rate with Prior Hemorrhage
Al-Shahi Salman et al¹	134	NI	MRI/clinical	2.4%	29.5%
Kondziolka et al⁸	122	NI	MRI/clinical	0.6%	4.5%
Moriarity et al¹⁵	68	228	MRI/clinical	3.1%^{^b}	NI
Porter et al¹⁶	173	NI	MRI/clinical	1.6%^{^b}	NI
Robinson et al¹⁷	57	66	MRI/clinical	0.7%^{^b,^c}	NI

Note:—NI indicates not indicated.
↵a Hemorrhage rates of supratentorial and infratentorial CCMs found in prospective registry studies. Hemorrhage rates are in patient-years.
↵b Overall hemorrhage rate.
↵c Hemorrhage rates in lesion-years.