Survival Benefit of Adjuvant Radiation Therapy for Gastric Cancer following Gastrectomy and Extended Lymphadenectomy

Table 3

Cox multivariate regression analysis for overall survival.

Variable	HR	95% CI	𝑃 value
No XRT	1.00	Reference	<0.001
Adjuvant XRT	0.67	0.64–0.71
Age
≤60	1.00	Reference	<0.001
>60	1.49	1.42–1.57
Gender
Male	1.00	Reference	<0.001
Female	0.88	0.84–0.91
Race
White	1.00	Reference
Black	1.06	0.99–1.13	0.075
Other	0.77	0.73–0.81	<0.001
Lymph nodes
LN <15 : >25	0.65	0.60–0.69	<0.001
LN 15–26 : >25	0.84	0.78–0.91	<0.001
Stage
IA	1.00	Reference
IB	1.689	1.55–1.84	0.004
II	3.08	2.84–3.35	<0.001
IIIA	4.44	4.08–4.83	<0.001
IIIB	6.02	5.34–6.78	0.003
IV (M0)	7.14	6.52–7.82	<0.001