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Table 4 Inter-item correlation for each factor of the 15-item ADL FAMM-Sp

From: Cross-cultural adaptation and validation of Spanish version of The Foot and Ankle Ability Measures (FAAM-Sp)

  Item-total correlation inside the factor Square multiple correlation Alpha if ítem deleted
FACTOR 1
 FAAM1 .653 .453 .901
 FAAM3 .660 .504 .904
 FAAM4 .792 .726 .887
 FAAM6 .727 .685 .895
 FAAM8 .797 .668 .885
 FAAM10 .754 .608 .891
 FAAM11 .745 .599 .891
FACTOR 2
 FAAM16 .844 .788 .897
 FAAM17 .857 .803 .890
 FAAM19 .818 .681 .900
 FAAM21 .814 .675 .912
FACTOR 3
 FAAM5 .785 .635 .876
 FAAM9 .803 .664 .870
 FAAM12 .782 .631 .879
 FAAM15 .782 .623 .879