Background: As patients aged 75 years and older are often underrepresented in randomized clinical trials, the external validity of clinical trials-based recommendations in older gastric patients was still controversial. The aim of this study is to explore the recommended treatment strategy for locally advanced gastric cancer in elderly patients.
Methods: We designed our study to specifically evaluate the cancer-specific survival (CSS) of four subgroups of patients according to four different treatment modalities: adjuvant radiation (RT), surgery only, RT only and no surgery/no RT by analyzing the Surveillance, Epidemiology, and End Results (SEER)-registered database. Kaplan-Meier methods were adopted and multivariable Cox regression models were built for the analysis of survival outcomes and risk factors.
Results: The 5-year CSS was 43.8 % in adjuvant RT, 28.5 % in surgery only, 14.9 % in RT only and 1.4 % in no surgery/no RT, which had significant difference in univariate log-rank test (P < 0.001) and multivariate Cox regression (P < 0.001). Moreover, we observed significant survival benefits in adjuvant RT group in all age categories, including age 75-79 years, age 80-84 years and age ≥85 years (all P < 0.001).
Conclusions: Surgery and adjuvant RT may be the recommended treatment strategy in elderly patients with locally advanced gastric cancer, especially for patients medically fit for the combined modality therapy.
Keywords: Elderly; Gastric cancer; SEER; Treatment.