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

Table 4

Cox multivariate regression analysis for disease-specific survival.

Variable	HR	95% CI	𝑃 value
No XRT	1.00	Reference	<0.001
Adjuvant XRT	0.69	0.65–0.73
Age
≤60	1.00	Reference	<0.001
>60	1.26	1.19–1.33
Gender
Male	1.00	Reference	<0.001
Female	0.88	0.84–0.93
Race
White	1.00	Reference
Black	1.04	0.97–1.11	0.307
Other	0.75	0.71–0.80	<0.001
Lymph nodes
LN <15 : >25	0.62	0.57–0.67	<0.001
LN 15–26 : >25	0.81	0.75–0.88	<0.001
Stage
IA	1.00	Reference
IB	2.47	2.18–2.80	<0.001
II	5.38	4.78–6.05	<0.001
IIIA	8.32	7.38–9.39	<0.001
IIIB	11.31	9.74–13.12	<0.001
IV (M0)	13.78	12.16–15.61	<0.001