Fig. 4

The graphs present the regression analysis of the MAQ with the FAOS (a), FAAM score (b) and LEFS (c). Pearson coefficients were r = 0.82 (MAQ vs. FAOS), r = 0.9 (MAQ vs. FAAM) and r = 0.74 (MAQ vs. LEFS). High PCCs indicate a correlation between the MAQ and the preexisting scores and identify the MAQ as a comprehensive ankle questionnaire. Furthermore, a representation of the existing scores in the new designed MAQ as a universal measurement tool can be assumed