• Lyen C Huang, Thuy B Tran, Yifei Ma, Justine V Ngo, and Kim F Rhoads.
• 1 Department of Surgery, Stanford University School of Medicine, Stanford, California 2 Stanford Cancer Institute, Stanford University School of Medicine, Stanford, California.
• Dis. Colon Rectum. 2015 May 1; 58 (5): 526-32.

BackgroundPrevious studies suggest that minorities cluster in low-quality hospitals despite living close to better performing hospitals. This may contribute to persistent disparities in cancer outcomes.ObjectiveThe purpose of this work was to examine how travel distance, insurance status, and neighborhood socioeconomic factors influenced minority underuse of high-volume hospitals for colorectal cancer.DesignThe study was a retrospective, cross-sectional, population-based study.SettingsAll hospitals in California from 1996 to 2006 were included.PatientsPatients with colorectal cancer diagnosed and treated in California between 1996 and 2006 were identified using California Cancer Registry data.Main Outcome MeasuresMultivariable logistic regression models predicting high-volume hospital use were adjusted for age, sex, race, stage, comorbidities, insurance status, and neighborhood socioeconomic factors.ResultsA total of 79,231 patients treated in 417 hospitals were included in the study. High-volume hospitals were independently associated with an 8% decrease in the hazard of death compared with other settings. A lower proportion of minorities used high-volume hospitals despite a higher proportion living nearby. Although insurance status and socioeconomic factors were independently associated with high-volume hospital use, only socioeconomic factors attenuated differences in high-volume hospital use of black and Hispanic patients compared with white patients.LimitationsThe use of cross-sectional data and racial and ethnic misclassifications were limitations in this study.ConclusionsMinority patients do not use high-volume hospitals despite improved outcomes and geographic access. Low socioeconomic status predicts low use of high-volume settings in select minority groups. Our results provide a roadmap for developing interventions to increase the use of and access to higher quality care and outcomes. Increasing minority use of high-volume hospitals may require community outreach programs and changes in physician referral practices.

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