Table 1. Clinical characteristics of primary gastric carcinomas.

Parameters	Evaluable patient number	Unevaluable patient number*		Established model	Failed Model	p-value
Gender	161	46				0.016 a
			Male	26	83
			Female	4	48
Median Age	195	12		62	62	0.532 b
Tumor grade	158	49				0.271 a
			2	12	33
			3	16	87
			4	2	8
Clinical stage	160	47				0.587 a
			1	0	4
			2	10	29
			3	14	70
			4	6	27
Tumor Size	161	46				0.729 a
			T1	0	2
			T2	2	7
			T3	28	115
			T4	0	7
Lymph node metastases	158	49				0.635 a
			N0	9	27
			N1	12	52
			N2	4	28
			N3	5	23
Distant Metastases	161	46				0.643 a
			M0	28	125
			M1	2	6
Lauren subtype	191	16				0.030 a
			Intestinal type	16	41
			Diffused type	11	86
			Mixed type	5	32
Site	158	49				0.415 a
			Pylorus	15	67
			Cardia	3	16
			Body	9	43
			Pylorus and body	0	4
			Lesser curvature	1	0
Recurrence	160	47				1.000 a
			No recurrence	28	124
			With recurrence	1	7
Mean Overall Survival (Month)	138	69				0.347 c
				14.0869	21
			Std Error	1.31631	12.01009777

^a: Fisher exact test

^b: Mann Whitney U Test

^c: Log Rank Test

* patients had missing information