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Correlation between primary care physician density and late-stage CRC incidence in Pennsylvania, by county population density. (a) Population density less than 130 persons/square mile. Pearson’s correlation coefficient: -0.45, p = 0.01. CRC—colorectal cancer. (b) Population density greater than 130 persons/square mile. Pearson’s correlation coefficient: -0.11, p = 0.52. CRC—colorectal cancer.
