TABLE 2.

Disease-specific survival analysis of 1068 patients with undifferentiated pleomorphic sarcoma (UPS)

Factor	Patients	Univariate p value	Multivariate p value	HR (95 % CI)
Age (years)		0.020	0.002	1.62 (1.19–2.22)
≥60	568
< 60	479
Gender		0.377
Female	436
Male	611
Size (cm)		< 0.001	< 0.001	2.84 (1.95–4.14)
< 5	306
≥5	550
RAS		< 0.001	< 0.001	3.27 (2.09–5.12)
Yes	55
No	1,013
Location		< 0.001	0.1
Head & neck	58
Trunk	258
Extremity	609
Retroperitoneal	120

HR, hazard ratio; CI, confidence interval; RAS, radiation-associated sarcoma