TABLE 1.

Three‐point and 5‐point Severity Scales of ARIA‐E.

ARIA‐E extent	ARIA‐E focality	SSAE‐3	SSAE‐5
No ARIA‐E	N/A	0	0
<5 cm	Monofocal	1 (Mild)	1 (Mild)
	Multifocal		2 (Mild+)
5–10 cm	Monofocal	2 (Moderate)	3 (Moderate)
	Multifocal		4 (Moderate+)
>10 cm	Monofocal	3 (Severe)	5 (Severe)
	Multifocal

Abbreviations: ARIA‐E, amyloid‐related imaging abnormalities–edema; N/A, not applicable; SSAE, Severity Scale of ARIA‐E.