Table 1.

Clinicopathological characteristics of each age group

			Age at diagnosis						P*
			20-39	40-49	50-59	60-69	70-79	80+
Characteristic	No.	(%)	Percentage
Age at diagnosis
20-39	761	(3.3)
40-49	1868	(8.2)
50-59	3375	(14.8)
60-69	5429	(23.8)
70-79	6990	(30.6)
80+	4385	(19.2)
Race									< 0.001
White	13337	(58.5)	56.0	51.9	52.9	56.2	60.1	66.2
Black	3433	(15.1)	17.9	21.4	19.2	16.0	13.0	10.7
Other	6038	(26.5)	26.1	26.7	27.9	27.8	26.8	23.1
Gender									< 0.001
Male	12853	(56.4)	48.4	55.5	61.3	61.5	56.9	47.1
Female	9955	(43.6)	51.6	44.5	38.7	38.5	43.1	52.9
T stage									< 0.001
T1	4849	(21.3)	14.8	18.2	19.9	21.8	22.9	21.4
T2	2735	(12.0)	10.1	10.5	11.4	11.7	12.1	13.7
T3	8267	(36.2)	35.0	37.5	35.6	36.6	35.8	36.7
T4	6957	(30.5)	40.1	33.8	33.2	29.9	29.2	28.3
N stage									< 0.001
N0	9028	(39.6)	30.4	33.9	35.3	38.2	42.2	44.4
N1	4163	(18.3)	15.6	17.7	16.7	18.0	18.5	20.0
N2	4254	(18.7)	23.3	18.8	19.3	18.9	18.1	17.9
N3	5363	(23.5)	30.7	29.6	28.6	24.9	21.2	17.7
Surgery type									< 0.001
Partial gastrectomy	15556	(68.2)	58.2	60.0	62.4	64.9	70.4	78.5
Near total/total gastrectomy	4053	(17.8)	22.5	22.7	21.2	20.1	16.2	11.8
Gastrectomy NOS	297	(1.3)	1.6	1.6	1.8	1.2	1.3	0.9
Combined resection	2902	(12.7)	17.7	15.7	14.6	13.8	12.1	8.8
Tumor size									< 0.001
≤ 45mm	10092	(44.2)	40.5	41.8	42.4	45.0	44.9	45.3
> 45mm	9792	(42.9)	44.8	43.5	42.8	41.9	42.6	44.2
Unknown	2924	(12.8)	14.7	14.7	14.8	13.1	12.5	10.4
Histological type									< 0.001
Intestinal	21038	(92.2)	85.7	87.9	90.0	91.7	93.8	95.2
Diffuse	1770	(7.8)	14.3	12.1	10.0	8.3	6.2	4.8

*P value from chi-square test

Due to rounding, the values in parentheses may not add up to 100

Abbreviations: NOS, not otherwise specified