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Table 2 Construct validity of the Dutch FAOS – Spearman’s correlation coefficients between FAOS and FFI, WOMAC and SF-36

From: Reliability and validity of the Dutch version of the foot and ankle outcome score (FAOS)

  FAOS
Symptoms Pain ADL Sports & recreational activity Quality of life
FFI
 Pain 0.56 0.90 0.86 0.71 0.78
 Disability 0.62 0.82 00.89 0.84 0.84
 Activity restriction 0.55 0.71 0.80 0.76 0.74
WOMAC
 Pain 0.57 0.89 0.90 0.74 0.78
 Stiffness 0.65 0.72 0.73 0.66 0.74
 Function 0.58 0.79 0.92 0.82 0.75
SF-36
 Physical functioning 0.53 0.62 0.79 0.71 0.62
 Social functioning 0.33 0.52 0.63 0.42 0.48
 Role-physical 0.37 0.51 0.60 0.53 0.48
 Role-emotional 0.11 0.21 0.36 0.24 0.21
 Mental health 0.12 0.15 0.20 0.26 0.28
 Vitality 0.27 0.46 0.54 0.51 0.50
 Pain 0.58 0.75 0.81 0.77 0.72
 General health 0.19 0.45 0.52 0.34 0.33
 Health change 0.14 0.42 0.44 0.42 0.38