Erythropoietin doses in dependence on HB values. Degrees of freedom: 456. Regression coefficient: -57.07. Correlation coefficient (R): - 0.49. Coefficient of determination: 24.48. Regression significance: P < 0.000. The regression is greatly significant and the same correlation coefficient is high due to the reduced amount of points distant from the straight line.
Soffritti et al. BMC Nephrology 2009 10:33 doi:10.1186/1471-2369-10-33