Construction, Validation, and Visualization of Two Web-Based Nomograms for Predicting Overall Survival and Cancer-Specific Survival in Elderly Patients with Primary Osseous Spinal Neoplasms

Table 1

The demographic and clinicopathologic information of elderly patients with POSNs in the OS group.

Variables	Total set; ()		Training set; ()		Validation set; ()		value
		%		%		%
Age
61-70	189	43.95	131	43.38	58	45.31	0.612
71-80	152	35.35	111	36.75	41	32.03
>80	89	20.70	60	19.87	29	22.66
Race
Black	23	5.35	16	5.30	7	5.47	0.195
Other	32	7.44	18	5.96	14	10.94
White	375	87.21	268	88.74	107	83.59
Sex
Female	183	42.56	129	42.72	54	42.19	1.000
Male	247	57.44	173	57.28	74	57.81
Histological type
Chordoma	184	42.79	127	42.05	57	44.53	0.622
Chondrosarcoma	138	32.09	101	33.44	37	28.91
Osteosarcoma	50	11.63	32	10.60	18	14.06
Other	58	13.49	42	13.91	16	12.50
Grade
Grade I	43	10.00	33	10.93	10	7.81	0.766
Grade II	67	15.58	48	15.89	19	14.84
Grade III	49	11.40	36	11.92	13	10.16
Grade IV	67	15.58	47	15.56	20	15.62
Unknown	204	47.44	138	45.70	66	51.56
T stage
T1	227	52.79	167	55.30	60	46.88	0.236
T2	188	43.72	126	41.72	62	48.44
T3	15	3.49	9	2.98	6	4.69
N stage
N0	415	96.51	289	95.70	126	98.44	0.259
N1	15	3.49	13	4.30	2	1.56
M stage
M0	383	89.07	264	87.42	119	92.97	0.129
M1	47	10.93	38	12.58	9	7.03
Marital status
Married	280	65.12	199	65.89	81	63.28	0.682
Unmarried	150	34.88	103	34.11	47	36.72
Tumor size(cm)
<6	141	32.79	100	33.11	41	32.03	0.976
6-12	206	47.91	144	47.68	62	48.44
>12	83	19.30	58	19.21	25	19.53
Surgery
No	161	37.44	113	37.42	48	37.50	1.000
Yes	269	62.56	189	62.58	80	62.50
Radiotherapy
No	275	63.95	193	63.91	82	64.06	1.000
Yes	155	36.05	109	36.09	46	35.94
Chemotherapy
No	365	84.88	257	85.10	108	84.38	0.965
Yes	65	15.12	45	14.90	20	15.62