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1.
Figure 2

Figure 2. From: Variants in the ITPA Gene Protect Against Ribavirin-Induced Hemolytic Anemia and Decrease the Need for Ribavirin Dose Reduction.

Survival analysis of ribavirin dose reduction. Survival analysis of time to first dose reduction (indication = anemia) according to ITPase deficiency variable, showing that mild or moderate ITPase deficiency protects against the need for RBV dose reduction. Censor criteria: 1 = dose reduction for anemia, 0 = last follow-up or date of dose reduction for an indication not related to anemia.

Alexander. J. Thompson, et al. Gastroenterology. ;139(4):1181-1189.
2.
Figure 1

Figure 1. From: Variants in the ITPA Gene Protect Against Ribavirin-Induced Hemolytic Anemia and Decrease the Need for Ribavirin Dose Reduction.

(A) Quantitative Hb reduction from baseline. The ITPase deficiency variable was associated with less absolute reduction in median Hb level at all time points on treatment. There was only 1 patient with severe (+ + +) ITPase deficiency, and this patient was excluded from the analysis. Data are presented as median and interquartile range. P values are listed above the relevant time points (*P ≤ .001). (B) Hb reduction >3 g/dL from baseline. The ITPase deficiency variable was protective against clinically significant reductions (>3 g/dL) in Hb throughout the course of pegIFN plus RBV combination therapy. There was only 1 patient with severe (+ + +) ITPase deficiency, and this patient was excluded from the analysis. P values for each time point are listed above the columns. ViraHep-C protocol involved a week 24 stopping rule for virological nonresponders, explaining the decreased cohort size after 24 weeks.

Alexander. J. Thompson, et al. Gastroenterology. ;139(4):1181-1189.

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