highly significantp ≤ 0.001
Differences between the clusters were highly significant for all parameters by ANOVA ( p ≤ 0.001), and significant differences were seen between Cluster 1 ( n = 26), Cluster 2 ( n = 59) and Cluster 3 ( n = 57) by Bonferroni post hoc test ( p ≤ 0.01), except for transferrin and serum iron.