Effect of THR and TKR surgery on CD62L cell surface expression of neutrophils (A) and monocytes (B). A, the points represent mean ± SD. p = <0.001 for neutrophils following THR and TKR surgery, as determined by ANOVA and the Friedman tests respectively. Baseline vs day 3 postoperative following THR p = 0.017, as determined by pairwise comparisons. p = <0.05 baseline vs 5 and 15 minutes reperfusion, day 1 and day 3 postoperatively following TKR (Wilcoxon test). (* = p < 0.05 compared to baseline). B, the points represent mean ± SD. p = >0.05 for monocytes following THR and TKR surgery.