Range of motion
Comparing the ROM of the hip joint of the operated leg with the unaffected leg, the Wilcoxon signed-rank test showed significant lower values in flexion (− 10.0° ± 14.9°; Spearman’s rank correlation coefficients for patient specific factors age (in years), follow-up interval (in weeks), length of skin incision (in cm), graft diameter (in cm), graft volume (in cmSignificance level of the correlation is given by the according 