Table 3. Risk score and survival of GC patients in training set, validation set and primary cohort.

Combined tumor marker Data set	Patients	Deaths	MST (months)	P Valuea	95%CI
Training set
No. of patients	783	316
Low, ≤3.74	546	170	28.45
High, >3.74	237	146	15.17	<0.001	2.792(2.234,3.491)
Validation set
No. of patients	783	327
Low, ≤3.74	512	183	24.72
High, >3.74	271	144	16.13	<0.001	1.765(1.418, 2.197)
Primary cohort
No. of patients	1566	643
Low, ≤3.74	1021	328	26.23
High, >3.74	545	315	16.27	<0.001	2.244(1.921, 2.621)

GC, gastric cancer; MST, median survival time.

^a Cox proportional hazards model.