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Race Influences Stage-specific Survival in Gastric Cancer

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Gastric adenocarcinoma studies show improved survival for Asians but have not reported stage-specific overall survival (OS) or disease-specific survival (DSS) by race. The Surveillance, Epidemiology and End Results database was queried for cases of gastric adenocarcinoma between 1998 and 2008. We evaluated OS and DSS by race and stage. Number of assessed lymph nodes was compared among surgical patients. Of 49,058 patients with complete staging data, 35,300 were white, 7709 were Asian, and 6049 were black. Asians had significantly better OS for all stages (P < 0.001) and significantly better DSS for Stages I (P < 0.0001) and II (P = 0.0006). As compared with blacks, whites had significantly better DSS for Stages I (P < 0.0001), II (P = 0.0055), III (P = 0.0165), and IV (P < 0.0001). Among the 28,133 (57%) surgical patients, average number of evaluated lymph nodes was highest for Asians (P < 0.0001). Among surgical patients with 15 or more nodes evaluated, DSS was worse in blacks with Stage I disease (P < 0.05). Blacks with gastric adenocarcinoma have a worse DSS, which disappears when surgical treatment includes adequate lymphadenectomy. Race-associated survival differences for gastric adenocarcinoma might simply reflect variations in surgical staging techniques and socioeconomic factors.
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Document Type: Research Article

Affiliations: John Wayne Cancer Institute at Saint John’s Health Center, Santa Monica, California, USA

Publication date: March 1, 2015

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