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

Table 1

Characteristics of patients with postoperative fibrosarcoma.

Variables	Total set		Training set		Validation set
	N = 439	%	N = 308	%	N = 131	%
	n		n		N
Age
<60	292	66.5	201	65.3	91	69.5
≥60	147	33.5	107	34.7	40	30.5
Race
Black	92	21	65	21.1	27	20.6
Others	40	9.1	34	11	6	4.6
White	307	69.9	209	67.9	98	74.8
Sex
Female	201	45.8	140	45.5	61	46.6
Male	238	54.2	168	54.5	70	53.4
Marital status
Married	220	50.1	151	49	69	52.7
Unmarried	219	49.9	157	51	62	47.3
Primary site
Head and neck	39	8.9	23	7.5	16	12.2
Trunk	191	43.5	133	43.2	58	44.3
Extremity	209	47.6	152	49.4	57	43.5
Grade
I	142	32.3	108	35.1	34	26
II	133	30.3	97	31.5	36	27.5
III	86	19.6	54	17.5	32	24.4
IV	78	17.8	49	15.9	29	22.1
Radiotherapy
No	302	68.8	214	69.5	88	67.2
RPS	14	3.2	11	3.6	3	2.3
RAS	123	28	83	26.9	40	30.5
Chemotherapy
No	389	88.6	278	90.3	111	84.7
Yes	50	11.4	30	9.7	20	15.3
Tumor size
<50	200	45.6	137	44.5	63	48.1
≥50	239	54.4	171	55.5	68	51.9
Historic stage
Localized	334	76.1	233	75.6	101	77.1
Regional	89	20.3	65	21.1	24	18.3
Distant	16	3.6	10	3.2	6	4.6

RPS, radiation prior to surgery; RAS, radiation after surgery.