Score for the Overall Survival Probability Scores of Fibrosarcoma Patients after Surgery: A Novel Nomogram-Based Risk Assessment System

Table 2

Univariate and multivariate Cox regression analyses of patients with postoperative fibrosarcoma.

Characteristics	Univariate analysis		Multivariate analysis
	HR (95% CI)	value	HR (95% CI)	value
Age
<60	Reference		Reference
≥60	3.531 (2.236–5.575)	≤0.001	2.776 (1.688–4.566)	≤0.001
Race
Black	Reference		Reference
Others	0.789 (0.238–2.622)	0.699	0.209 (0.051–0.851)	0.029
White	2.246 (1.079–4.678)	0.031	1.161 (0.524–2.571)	0.712
Sex
Female	Reference
Male	1.327 (0.846–2.081)	0.218
Marital status
Married	Reference
Unmarried	1.295 (0.828–2.026)	0.257
Primary site
Head and neck	Reference
Trunk	0.723 (0.314–1.667)	0.447
Extremity	1.083 (0.489–2.400)	0.844
Grade
I	Reference		Reference
II	7.157 (2.490–20.574)	≤0.001	8.068 (2.756–23.621)	≤0.001
III	14.008 (4.859–40.386)	≤0.001	10.298 (3.520–30.130)	≤0.001
IV	18.089 (6.311–51.847)	≤0.001	14.840 (5.060–43.521)	≤0.001
Radiotherapy
No	Reference
Radiation prior to surgery	1.438 (0.518–3.992)	0.485
Radiation after surgery	1.295 (0.808–2.077)	0.283
Chemotherapy
No	Reference		Reference
Yes	3.429 (2.041–5.760)	≤0.001	0.879 (0.440–1.757)	0.715
Tumor size
<50	Reference		Reference
≥50	3.050 (1.802–5.160)	≤0.001	1.597 (0.904–2.821)	0.107
Historic stage
Localized	Reference		Reference
Regional	1.731 (1.051–2.851)	0.031	1.197 (0.712–2.010)	0.498
Distant	9.271 (4.513–19.047)	≤0.001	10.556 (3.857–28.889)	≤0.001