Synchronous and metachronous neoplasms in gastric cancer patients: A 23-year study

Table 1 Comparison of clinicopathological features of gastric cancer patients with and without a second primary cancer n (%)

Characteristic	Total	Gastric cancer	Multiple gastric cancer	P value
Gender				0.499
Male	570 (66.1)	534 (66.4)	36 (62.1)
Female	292 (33.9)	270 (33.6)	22 (37.9)
Total	862	804	58
Age1 (yr)	59.8 ± 12.8	59.5 ± 13.0	63.4 ± 11.4	0.026
DS (mo)	25.1 ± 46.4	25.1 ± 46.5	26.3 ± 46.3	0.433
FHC				0.806
No	369 (52.6)	342 (52.7)	27 (50.9)
Yes	333 (47.4)	307 (47.3)	26 (49.1)
Total	702
Location2				0.467
Proximal	181 (21)	171 (21.3)	10 (17.2)
Other location	681 (79)	633 (78.7)	48 (82.8)
Total	862
Histology				0.116
Intestinal	260 (43.4)	234 (42.2)	26 (57.8)
Diffuse	289 (48.3)	272 (49.1)	17 (37.8)
Mixed	50 (8.3)	48 (8.7)	2 (4.4)
Total	599
Stage				0.100
Early	119 (16.4)	106 (15.7)	13 (24.5)
Advanced	608 (83.6)	568 (84.3)	40 (75.5)
Total	727
Blood group				0.002
A	211 (37.2)	198 (38.1)	13 (27.1)
B	106 (18.7)	98 (18.9)	8 (16.7)
O	191 (33.7)	164 (31.6)	27 (56.2)
AB	59 (10.4)	59 (11.4)	None
Total	567

¹Data are expressed as mean ± SD;

²Tumor location. DS: Duration of symptoms; FHC: Family history of cancer.