Table 3.

Cox regression with stepwise variable reduction

Dependent: Survival (time, status)		HR (univariable)	HR (multivariable)
Age	Mean (SD)	1.02 (1.01-1.02, P < 0.001)	1.01 (1.01-1.02, P < 0.001)
Sex	Female	-	-
	Male	1.00 (0.93-1.07, P = 0.999)	-
Race	White	-	-
	Black	0.91 (0.82-1.02, P = 0.109)	0.89 (0.75-1.05, P = 0.165)
	Other	0.77 (0.71-0.85, P < 0.001)	0.84 (0.73-0.96, P = 0.009)
Tumor size	< 2	-	-
	2-5	1.27 (1.07-1.52, P = 0.008)	1.08 (0.83-1.40, P = 0.558)
	> 5	1.98 (1.66-2.36, P < 0.001)	1.41 (1.09-1.82, P = 0.009)
	Unknown	2.24 (1.86-2.70, P < 0.001)	1.69 (1.29-2.22, P < 0.001)
Grade	G1/G2	-	-
	G3/G4	1.11 (0.89-1.37, P = 0.348)	-
	Unknown	1.16 (0.90-1.51, P = 0.245)	-
Primary site	Body	-	-
	Cardia	1.16 (1.00-1.35, P = 0.051)	1.23 (0.98-1.53, P = 0.071)
	Fundus	1.07 (0.83-1.38, P = 0.608)	1.14 (0.78-1.65, P = 0.503)
	Gastric antrum	1.11 (0.97-1.26, P = 0.135)	1.06 (0.87-1.30, P = 0.551)
	Greater curvature	1.02 (0.84-1.23, P = 0.878)	1.25 (0.96-1.64, P = 0.103)
	Lesser curvature	0.90 (0.78-1.05, P = 0.190)	1.00 (0.79-1.27, P = 0.972)
	Pylorus	1.07 (0.88-1.30, P = 0.492)	1.09 (0.82-1.46, P = 0.545)
	Overlapping lesion	1.53 (1.32-1.78, P < 0.001)	1.38 (1.10-1.73, P = 0.005)
	Unknown	1.45 (1.24-1.69, P < 0.001)	1.34 (1.06-1.69, P = 0.014)
Pathologic stage	IB	-	-
	IIA	1.37 (1.01-1.85, P = 0.045)	1.59 (0.98-2.59, P = 0.062)
	IIB	1.94 (1.44-2.61, P < 0.001)	2.37 (1.47-3.84, P < 0.001)
	IIIA	5.54 (4.14-7.40, P < 0.001)	3.41 (2.13-5.44, P < 0.001)
	IIIB	2.73 (2.05-3.65, P < 0.001)	4.86 (3.05-7.76, P < 0.001)
	IIIC	3.83 (2.87-5.10, P < 0.001)	7.42 (4.62-11.92, P < 0.001)
Lymph node count	Mean (SD)	0.99 (0.99-1.00, P < 0.001)	0.98 (0.98-0.98, P < 0.001)
Chemotherapy status	No/unknown	-
	Yes	0.64 (0.59-0.69, P < 0.001)
Radiation status	No/unknown	-	-
	Yes	0.63 (0.59-0.68, P < 0.001)	0.69 (0.62-0.77, P < 0.001)

For race, ‘other’ includes American Indian, AK Native, Asian, and Pacific Islander. HR: Hazard ratio.