Development and External Validation of a Nomogram for Predicting Overall Survival in Stomach Cancer: A Population-Based Study

Table 3

Multivariate analysis of survival in the Training Group.

Variables	Training Group (n = 4456)
	HR	95% CI	value
Age, years
<65	Ref
65–80	1.337	(1.203, 1.486)	<0.001
≥81	1.640	(1.424, 1.888)	<0.001
Race
White	Ref
Black	1.125	(0.994, 1.274)	0.062
Others	0.755	(0.677, 0.843)	<0.001
Marital status
Married	Ref
Widowed	1.252	(1.103, 1.420)	0.001
Others	1.150	(1.032, 1.281)	0.011
T stage
T1	Ref
T2	1.377	(1.109, 1.710)	0.004
T3	2.473	(2.074, 2.949)	<0.001
T4	3.971	(3.315, 4.756)	<0.001
N stage
N0	Ref
N1	1.746	(1.504, 2.026)	<0.001
N2	1.951	(1.676, 2.271)	<0.001
N3	2.316	(1.928, 2.783)	<0.001
M stage
M0	Ref
M1	1.934	(1.716, 2.181)	<0.001
Surgery
No	Ref
Yes	0.241	(0.167, 0.346)	<0.001
Chemotherapy
No	Ref
Yes	0.473	(0.427, 0.523)	<0.001
Grade
I + II	Ref
III + IV	1.220	(1.093, 1.362)	<0.001
Regional nodes positive	1.017	(1.009, 1.026)	<0.001

HR, hazard ratio; CI, confidence interval.