Influence of race and geographic setting on the management of gastric adenocarcinoma.

BACKGROUND AND OBJECTIVES: Conflicting evidence indicates that both race and geographic setting may influence the management of malignancies such as gastric adenocarcinoma (GAC). METHODS: We designed a retrospective cohort study utilizing data from the Surveillance, Epidemiology, and End Results program to identify patients with resectable GAC (N = 15 991). Exposures of interest were race and geographic region of diagnosis (West [WE], Midwest [MW], South [SO], or Northeast [NE]). Endpoints included: (1) recommendation against surgery and (2) gastric adenocarcinoma-specific survival (GACSS). Multivariable logistic and Cox regression models were used to identify pertinent associations. RESULTS: A total of 15 991 patients were included (2007-2015). In adjusted analysis, African American individuals more frequently received a recommendation against surgical resection than White (adjusted odds ratio [aOR] = 0.86; 95% confidence interval [CI], 0.76-0.98), Asian American (aOR = 0.55; 95% CI, 0.46-0.65), and American Indian (aOR = 0.50; 95% CI, 0.31-0.82) individuals. In addition to race-based discrepancies, there was a significant association between geography and management: individuals diagnosed with GAC in the SO were more likely to receive a recommendation against surgery (odds ratio = 1.35; 95% CI, 1.23-1.49) and exhibited poorer GACSS as compared with those in the WE, MW, or NE regions. CONCLUSIONS: Race and geographic region of diagnosis affect treatment recommendations and GACSS among individuals with resectable tumors. African Americans with resectable cancers are more likely to receive a recommendation against surgery than individuals of other racial groups.

Racial Disparity in Incidence and Survival for Gastrointestinal Stromal Tumors (GISTs): an Analysis of SEER Database.

BACKGROUND: Gastrointestinal tumors (GISTs) represent the most common mesenchymal tumors of the gastrointestinal tract. There has been limited data on GIST incidence and survival disparities between ethnic groups. AIMS: Assess disparities in incidence and survival among race in the USA in the era of available GIST histologic codes and treatment. METHODS: We queried Surveillance, Epidemiology, and End Results (SEER) database for GIST from 2002 to 2015, with diagnostic code 8936. RESULTS: Of the 7204 patients identified, 4928 (68.4%) were White, 1308 (18.2%) African American (AA), and 968 (13.4%) were classified as "Other" (American Indian/Alaskan Native, Asian/Pacific Islander). The overall incidence rate (IR) was 0.75 per 100,000. IR was highest among AA at 1.37/100,000, but 0.65/100,000 for Whites, 1.10/100,000 for Asians/Pacific Islanders, and 0.28/100,000 for American Indians/Alaskan Natives. The GIST incidence was twice as high for AA as for Whites (rate ratio [RR]: 2.12; 95% CI: 1.98-2.26; p < 0.001). There was higher proportion of Whites than AA, who underwent surgical extirpation. Median overall survival (OS) and GIST specific survival (GSS) were not reached for all race, which indicates more than half of the patients were still alive at end of follow-up period. In multivariate Cox model, belonging to "Other" had better OS (adjusted hazard ratio [aHR]; 0.73, 95% CI: 0.55-0.95, P = 0.021) for GIST, but no difference in prognosis and OS for AA and White [(aHR for whites; 0.84, 95% CI: 0.69-1.02, P = 0.071), AA = reference]. There was no difference in GSS among races. CONCLUSIONS: Significant racial disparity in incidence and overall survival for GIST exists, and efforts should be made to bridge this gap and improve outcomes for all races. The overall incidence rate for GIST was noted to be 7.5 per 1 million, and IR of GIST was twice as high for African Americans as compared to Whites. The "Other" racial group (American Indians/Alaskan Natives, Asians, and Pacific Islanders) had superior OS as compared to African Americans and Whites.