Table 2:

Multivariate logistic regression analysis for the diagnosis of peritoneal metastasis in gastric cancer patients in each cohort

	Univariate analysis			Multivariate analysis
Variable	OR	95%CI	P-value	OR	95%CI	P-value
Testing cohort
Age ≧ 69	1.87	0.57-6.82	0.31
Male	1.16	0.35-4.24	0.81
Macroscopical type 3 or 4	7.91	1.91-54.27	0.003	6.83	1.45-50.61	0.01
Tumor size >55mm	2.19	0.66-7.99	0.2
Poorly differentiated histology	2.05	0.60-8.28	0.26
MiRNA combined signature high risk	13.12	3.12-90.96	0.0002	11.74	2.61-84.97	0.0008
Validation cohort
Age ≧ 70	0.54	0.15-1.72	0.3
Male	1.44	0.40-6.84	0.6
Macroscopical type 3 or 4	4.73	1.34-22.26	0.01	4.97	1.20-26.99	0.03
Tumor size >55mm	4.73	1.34-22.26	0.01	6.63	1.62-35.88	0.007
Poorly differentiated histology	2.76	0.86-9.80	0.09
MiRNA combined signature high risk	14.15	2.60-263.78	0.0007	17.52	2.89-343.90	0.0007
Performance evaluation cohort
Age ≧ 69	1.48	0.77-2.88	0.24
Male	0.81	0.38-1.77	0.58
Macroscopical type 3 or 4	5.82	2.74-13.59	<0.0001	6.44	2.76-16.51	<0.0001
Tumor size >55mm	3.25	1.64-6.72	0.0006	2.24	1.03-5.01	0.04
Poorly differentiated histology	2.31	1.13-5.07	0.02	1.73	0.76-4.17	0.19
MiRNA combined signature high risk	3.56	1.82-7.09	0.0002	5.22	2.42-11.80	<0.0001

OR, Odds Ratio; CI, Confidence Interval. Bold indicates a statistically significant.