Source:Cancer Epidemiology, Volume 52
Author(s): Kristy D. Nguyen, Zain Z. Hyder, Marshall D. Shaw, Sarah B. Maness, Michael S. Cookson, Sanjay G. Patel, Kelly L. Stratton
ObjectiveTo evaluate effects of PCP density, insurance status, and urologist presence on stage of diagnosis for urologic malignancies. Cancer stage at diagnosis is an important outcome predictor. Studies have shown an inverse relationship to primary care physician (PCP) density and insurance coverage with stage of cancer diagnosis.MethodsData was obtained from OK2Share, an Oklahoma Central Cancer Registry, for bladder, kidney, and prostate cancer from 2000 to 2010. Physician data was obtained through the State Licensing Board. The 2010 national census was used for population data. High PCP density was defined as greater than or equal to the median value: 3.17 PCP/10,000 persons. Chi-square and multivariate logistic regressions were used to analyze effects of PCP density, insurance status, and urologist presence on advanced stage diagnosis.Results27,086 patients were identified across 77 counties. As PCP density increased by 1 PCP/10,000 persons, the odds ratios (OR) of an advanced stage at diagnosis were 0.383, 0.468, 0.543 for bladder, kidney, and prostate cancer respectively. Compared to private insurance, being uninsured had OR of 1.61 and 2.45 respectively for kidney and prostate cancers. The OR of an advanced stage diagnosis for bladder and prostate cancer were 3.77 and 1.73, respectively, in counties with a urologist.ConclusionsIncreased PCP density and insurance coverage reduced the odds of an advanced diagnosis. Implementation of policies to improve access to healthcare including through increasing PCP density and reducing the number of uninsured patients should result in diagnosis at an earlier stage, which will likely improved cancer-related outcomes.
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