MOESM1 of Relationship between ITPA polymorphisms and hemolytic anemia in HCV-infected patients after ribavirin-based therapy: a meta-analysis
Creators: name: Pineda-Tenor, Daniel
name: García-Álvarez, Mónica
name: Jiménez-Sousa, María
name: Vázquez-Morón, Sonia
name: Resino, Salvador
Publisher: name: Figshare
Year: 2015
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Pharmacology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: FOS: Earth and related environmental sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Science Policy

description: Additional file 1: Table S1. Methodological quality of the studies included in the meta-analysis, which was assessed using a modified score based in the Newcastle–Ottawa Scale (Stang A. Critical evaluation of the Newcastle–Ottawa scale for the assessment of the quality of nonrandomized studies in meta-analyses. Eur J Epidemiol 2010;25:603–605). (see Supplemental Box 2). Table S2. Meta-regression analysis for hemoglobin decline (A–C), severe anemia (D) and ribavirin dose reduction or discontinuation (E) according to ITPA polymorphisms. Box 1. Description of rs1127354/rs7270101 haplotype: ITPase deficiency ranged from absent (-) (representing wild-type activity) to mild (+), moderate (++) or severe (+++) (8, 10). Box 2. Methodological criteria used to evaluate the quality of the studies included in the meta-analysis. This score was adapted from Newcastle–Ottawa Scale (Stang A. Critical evaluation of the Newcastle-Ottawa scale for the assessment of the quality of nonrandomized studies in meta-analyses. Eur J Epidemiol 2010;25:603–605). Figure S1. Publication bias for the rs1127354 studies included in the meta-analysis for hemoglobin decline(A), severe anemia (B) and ribavirin dose reduction or discontinuation (C) according both to Begg’s funnel plots and Egger’s test. Abbreviations: Coef., asymmetry regression coefficient; Std.Err., standard error; t, statistic; P&gt;|t|, significance; and CI, confidence interval. Coefficients correspond to the intercept value in the regression equation, which estimates the asymmetry of the funnel plot. Positive values (Coef.&gt; 0) indicate higher levels of effect size in studies with smaller sample sizes. Figure S2. Publication heterogeneity for studies included in the meta-analysis for hemoglobin decline: rs1127354 (A), rs7270101 (B), rs6051702 (C); severe anemia: haplotype rs1127354CC / rs7270101AA (D); and ribavirin dose reduction or discontinuation: rs1127354 (E); according to Galbraith’s plots. Abbreviations 1/s.e, precision; b/s.e, standardized effect. Figure S3. Sensitivity analysis for studies included in the meta-analysis for hemoglobin decline: rs1127354 (A), rs7270101 (B), rs6051702 (C), haplotype absent (-) vs. mild (+)/moderate (++)/severe (+++) (D), haplotype mild (+) vs. moderate (++)/severe (+++) (E) and moderate (++) vs. severe (+++) (F). Sensitivity analyses were carried out to investigate the influence of any one study on the overall meta-analysis by sequential omission of individual studies. Figure S4. Forest plot of the meta-analysis performed to investigate the association between ITPA rs6051702 polymorphisms and hemoglobin decline, included in the Hwang, et al. Article (32). Abbreviations: CI, confidence intervals; OR, odds ratio. Figure S5. Sensitivity analysis for studies included in the meta-analysis for severe anemia: rs1127354 (A), haplotype absent (-) vs. mild (+)/moderate (++)/severe (+++) (B) and haplotype mild (+) vs. moderate (++)/severe (+++) (C). Sensitivity analyses were carried out to investigate the influence of any one study on the overall meta-analysis by sequential omission of individual studies. Figure S6. Sensitivity analysis for studies included in the meta-analysis for ribavirin dose reduction or discontinuation: rs1127354 (A), haplotype absent (-) vs. mild (+)/moderate (++)/severe (+++) (B), haplotype mild (+) vs. moderate (++)/severe (+++) (C) and moderate (++) vs. severe (+++) (D). Sensitivity analyses were carried out to investigate the influence of any one study on the overall meta-analysis by sequential omission of individual studies.