**p** refer to the p-value of Kruskal-Wallis test of differences between all groups (non-parametric equivalent test to ANOVA).**p**^{*} denote the p-value of equality of medians.**p**^{**} denote the p-values for Kruskal-Wallis and medians’ test respectively for comparing groups Neutral and Varus only (due to insufficient number of valgus stems for analysis).^{‡}Retro types include retro 8° and 15°, retro-varus and retro-valgus, SD: standard deviation.