Fig. 1

RDW values for different patient populations. A RDW values of different patient groups measured in the retrospective review: Boxplot of RDW values of CRF and HMV patient groups compared to healthy volunteers. Kruskal Wallis ANOVA p-value is < .001 for the three groups, significant differences marked with an asterix are based on pairwise post-hoc testing. B Baseline RDW values by HMV indications measured in the prospective study: Boxplot of baseline RDW values of HMV patients grouped by diagnosis. C RDW values after initiation of HMV at different time points of the prospective study: Boxplot of RDW values at different time points of HMV treatment. Significant differences, based on Friedman ANOVA, are marked with an asterix (0 vs 6 months: p < 0.001; 1 vs 6 months: p = 0.002)