Table 4.

Scoring systems for intracranial aneurysm risk assessment

Score	Outcome	Variables
PHASES [3]	Rupture	Population, hypertension, age > 70, aneurysm size, earlier SAH and aneurysm location.
ELAPSS [19]	Growth	Population, age > 60, aneurysm size, earlier SAH, aneurysm location and shape.
ISUIA [20]	Rupture	Aneurysm size and location, and earlier SAH.
JRCCA [11]	Rupture	Hypertension, age > 50, aneurysm size, earlier SAH, aneurysm location and shape.
Rotterdam [21]	Rupture	Hypertension, age > 60, aneurysm size, aneurysm location and shape.

Abbreviations: PHASES = Population, Hypertension, Age, Size, Earlier subarachnoid hemorrhage, and Site; ELAPSS = Earlier SAH, location, age, population, size, and shape; ISUIA = International Study of Unruptured Intracranial Aneurysms; JRCCA = Japanese Risk Score for Cerebral Aneurysm Rupture.