Preventive Effect of Hippocampal Sparing on Cognitive Dysfunction of Patients Undergoing Whole-Brain Radiotherapy and Imaging Assessment of Hippocampal Volume Changes

Table 2

Prognostic evaluation criteria for GPA grading.

Prognostic factors	Scores
	0	0.5	1
Age	≥60	50~59	<50
KPS score	<70	70~80	90~100
Number of brain metastases	>3	2~3	1
Extracranial metastases	Yes	—	No