Several factors including ITPA polymorphism influence ribavirin-induced anemia in chronic hepatitis C

Figure 4 Correlation between predicted and measured values of hemoglobin decline at week 4 of treatment. Predicted values were yielded by the multiple linear regression model that was constructed in the derivation group. Measured values were derived from the confirmatory group. There was a significant correlation between predicted and measured values (Spearman’s ρ = 0.880, P = 1.16 × 10^-56). The area between lower and upper parallel lines of the diagonal line includes 95% of patients analyzed.