Table 1.

Clinicopathological features of patients with or without synchronous cancer

Synchronous	Synchronous cancer With n (%)	Characteristics cancer Without n (%)	P value
Age (yr, mean±SD)	64.6 ± 9.5	59.4 ± 12.5	< 0.001
Sex			0.002
Male	90 (81.1)	2144 (67.4)
Female	21 (18.9)	1036 (32.6)
Multiplicity			0.009
Single	106 (95.5)	3146 (98.9)
Multiple	5 (4.5)	34 (1.1)
Preoperative Stage			< 0.001
Early gastric cancer	62 (55.4)	1135 (35.7)
Advanced gastric cancer	50 (44.6)	2045 (64.3)
Differentiation			< 0.001
Differentiated	94 (84.7)	1383 (43.4)
Undifferentiated	17 (15.3)	1797 (56.6)