Table 5.

Analysis using Cox regression model for independent risk factors after R0 D2 gastrectomy (n = 550)

Risk factors for metachronous peritoneal carcinomatosis
	Risk factor	P	Factor* (CI 95% confidence interval)
Independent significant risk factors	T3/4 (serosapositive)	0,003	2,35 (1,35 - 4,12)
	Signet ring cell	0,004	3,88 (1,56 - 9,71)
	Nodal positive	0,003	2,39 (1,34 - 4,26)
	Grading 3/4	0,018	2,03 (1,13 - 3,65)
Non significant risk factors	Time period (I)	0,247	1,39 (0,69 - 2,81)
	Age (<50y)	0,776	0,82 (1,65 - 0,41)
	Sex (male)	0,399	1,25 (2,08 - 0,75)
	Perioperative chemotherapy	0,392	0,68 (1,64 - 0,28)

*Is the factor by witch the risk for development of metachronous PC is increased.