Table 3. Univariate and multivariate analyses with respect to overall survival after surgery in 619 patients with gastric cancer.

	Univariate		Multivariate
	Odds ratio (95% CI)	P value	Odds ratio (95% CI)	P value
CD9 on tumour cells (positive)	2.09 (1.51–2.85)	<0.0001	1.43 (1.02–1.97)	0.036
CD9 in stromal cells (positive)	1.99 (1.40–2.77)	0.0001	1.26 (0.91–1.74)	0.16
CD9 on tumour cells and in stromal cells (Both positive)	2.08 (1.49–2.87)	<0.0001	1.40 (0.99–1.95)	0.051
Age (⩾65 y.o.)	1.52 (1.11–2.11)	0.009	1.47 (1.07–2.02)	0.015
Sex (male)	1.24 (0.90–1.72)	0.18
Macrosopic type (Type 4)	7.47 (5.25–10.5)	<0.001	2.46 (1.70–3.56)	<0.001
Histologic type (undifferentiated)	1.94 (1.43–2.68)	<0.001	1.17 (0.81–1.68)	0.38
Tumour depth (T3 and T4)	6.56 (4.57–9.64)	<0.001	1.90 (1.21–3.05)	0.0044
Lymph node metastasis (positive)	8.38 (5.66–12.8)	<0.001	3.15 (1.98–5.17)	<0.001
Distant metastasis (positive)	6.39 (3.59–10.5)	<0.001	2.54 (1.48–4.11)	0.0012
Lymphatic invasion (positive)	5.53 (3.67–8.67)	<0.001	1.19 (0.73–2.02)	0.47
Venous invasion (positive)	3.29 (2.36–4.53)	<0.001	1.63 (1.02–1.97)	0.0059

Abbreviations: CI=confidence interval; y.o.=years old.