Table 3.

Multivariable cox regression analysis predicting mortality risk for metastatic GC both in unmatched and matched cohorts.

	Unmatched cohort			Matched cohort
Characteristics	n	HR (95CI%)	p-Value	n	HR (95CI%)	p-Value
Age at diagnosis (years)
20–39	26	1[Reference]	NA	20	1[Reference]	NA
40–59	107	1.28 (0.73–2.24)	0.39	64	1.16 (0.64–2.12)	0.62
60–79	109	1.27 (0.71–2.28)	0.42	74	1.10 (0.60–2.02)	0.75
>=80	7	0.92 (0.29–2.95)	0.89	4	0.52 (0.12–2.30)	0.39
Sex
Male	174	1[Reference]	NA	115	1[Reference]	NA
Female	75	0.85 (0.58–1.24)	0.39	47	0.85 (0.56–1.29)	0.45
Race
White	179	1[Reference]	NA	123	1[Reference]	NA
Black	27	1.05 (0.59–1.86)	0.86	11	0.74 (0.34–1.59)	0.44
Others	43	0.85 (0.53–1.37)	0.51	28	0.89 (0.54–1.49)	0.67
T stage
T1	21	1[Reference]	NA	17	1[Reference]	NA
T2	15	1.74 (0.72–4.25)	0.22	8	0.97 (0.34–2.75)	0.95
T3	88	1.07 (0.56–2.04)	0.84	65	0.59 (0.31–1.13)	0.11
T4	80	1.13 (0.56–2.33)	0.71	45	0.77 (0.40–1.49)	0.43
TX	45	0.90 (0.47–1.72)	0.76	27	1.17 (0.57–2.40)	0.67
N Stage
N0	50	1[Reference]	NA	34	1[Reference]	NA
N1	89	1.22 (0.76–1.95)	0.41	68	1.21 (0.73–2.03)	0.46
N2	49	1.22 (0.69–2.17)	0.49	31	0.81 (0.43–1.54)	0.53
N3	49	1.74 (1.00–3.04)	0.05	18	1.55 (0.77–3.1)	0.22
NX	12	1.24 (0.61–2.55)	0.55	11	1.73 (0.81–3.68)	0.16
Location
Cardia & Fund	132	1[Reference]	NA	98	1[Reference]	NA
Body	21	0.85 (0.44–1.65)	0.63	17	0.68 (0.36–1.26)	0.22
Antrum & Pylorus	39	1.82 (1.00–3.30)	0.05	21	0.87 (0.49–1.56)	0.64
Others	57	2.10 (1.20–3.68)	0.01	26	1.14 (0.68–1.91)	0.62
Surgery
No	103	1[Reference]	NA	81	1[Reference]	NA
Yes	146	0.23 (0.14–0.36)	<0.0001	81	0.31 (0.21–0.46)	<0.0001