Table 4.

Cox regression analysis for risk stratification of nomograms in the training and validation sets

	Survival rate (%)			Median survival time (months)	HR (95% CI)	P Value
	1 – Year	3 – Year	5 – Year
Training set
Low risk	83.18	42.82	31.12	31.43	Reference
Moderate risk	63.24	18.77	11.59	15.70	1.974(1.723–2.263)	< 0.001
High risk	32.75	8.19	5.04	8.83	3.798(3.126–4.614)	< 0.001
Validation set
Low risk	76.75	29.71	21.91	22.57	Reference
Moderate risk	56.30	12.94	8.36	13.23	1.785(1.488–2.141)	< 0.001
High risk	26.36	6.59	4.71	7.97	3.154(2.455–4.050)	< 0.001