Table 3. Prognostic value of risk score stratified by histological type and treatment modality.

Parameters	Number	HR	95% CIs		P
Histological type
Leiomyosarcoma (LMS)	103	2.901	1.538	5.473	0.001
Dedifferentiated liposarcoma	58	3.952	1.529	10.211	0.005
Undifferentiated pleomorphic sarcoma	51	2.116	0.679	6.596	0.196
Treatment modality
Radiation therapy	178	3.865	2.267	6.588	< 0.001
Non-radiation therapy	73	3.082	1.298	7.318	0.011