Differentiation of Pelvic Osteosarcoma and Ewing Sarcoma Using Radiomic Analysis Based on T2-Weighted Images and Contrast-Enhanced T1-Weighted Images

Table 1

Characteristics of patients and tumors.

	Patient characteristics
	OS	EWS	value	value
No. of patients	35	31
Age (years)
(range)	(13–87)	(10–66)	1.846^a	0.069
Gender (M/F)
Male	19 (47.5%)	21 (52.5%)	1.247^b	0.264
Female	16 (61.5%)	10 (38.5%)
Location of tumors
Ilium	21 (56.8%)	16 (43.2%)	2.472^b	0.781
Acetabulum	2 (66.7%)	1 (33.3%)
Pubis	5 (62.5%)	3 (37.5%)
Ischium	1 (25.0%)	3 (75.0%)
Sacrum & coccyx	5 (45.5%)	6 (55.5%)
Soft tissues	1 (33.3%)	2 (66.7%)

Note: a = -test; b = chi-square test.