ALB and clostridium difficile infection: Results of Bonferroni post hoc analysis after One-Way ANOVA analysis revealed that there were significant differences in serum albumin means (see Additional file 1, for mean and median level pair wise comparisons) between the survival group and the groups; CDI related mortality (P = < 0.001) and non-CDI related mortality (P = 0.011), whilst Independent Samples K-median tests determined that the difference in median respiratory rate across the groups was significantly different (χ2(df = 2) =11.8; P = 0.003) from the grand median (16 resps/min).