Table 1.

The baseline demographics and clinical characteristics of patients in the training and validation cohorts.

Characteristics	Training cohort (n= 118)	Validation cohort (n =51)	P value
Gender, No. (%)
Male	96 (81.4)	40 (78.4)	0.660 a
Female	22 (18.6)	11 (21.6)
Age, median (range), years	65 (27, 89)	63 (29, 87)	0.670 b
<65 years, No. (%)	57 (48.3)	27 (52.9)
≥65 years, No. (%)	61 (51.7)	24 (47.1)
Grade, No. (%)
High grade	44 (37.3)	19 (37.3)	0.997 a
Low grade	74 (62.7)	32 (62.7)
Number of tumors c , No. (%)
Single	86 (72.9)	38 (74.5)	0.826 a
Multiple	32 (27.1)	11 (21.6)
Tumor size c , median (range), cm	1.7 (0.6, 4.5)	1.5 (0.5, 4.2)	0.459 b

^aStatistical analysis performed using chi-square test.

^bStatistical analysis performed using Mann–Whitney U test.

^cMRI-determined information.