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Table 5 Inter-rater reliability for categorical measures.

From: Development and evaluation of a tool for the assessment of footwear characteristics

  % agreement Kappa
Variable Day 1 Day 2 Day 1 Day 2
Fit     
   Adequate length (palpation) 88 83 0.59 0.66
   Adequate length (straw method) 97 90 0.93 0.79
   Adequate width 92 97 0.68 0.82
   Adequate depth 97 93 0.78 0.00*
General     
   Age of shoe 100 100 1.00 1.00
   Type of shoe 98 98 0.93 0.93
   Upper materials 95 93 0.87 0.82
   Outsole materials 100 97 1.00 0.65
General structure     
   Heel height 95 92 0.83 0.71
   Forefoot height 93 93 0.76 0.77
   Longitudinal profile 95 83 0.81 0.51
   Last shape 98 100 0.79 1.00
   Fixation (Outersole to midsole) 85 90 0.70 0.80
   Sole flexion point 97 97 0.82 0.83
Motion control properties     
   Dual density presence 100 100 1.00 1.00
   Fixation (upper to foot) 85 90 1.00 0.93
   Heel counter stiffness 93 96 0.81 0.86
   Midfoot sagittal stability 88 95 0.69 0.87
   Midfoot torsional stability 89 93 0.84 0.83
Cushioning     
   Cushioning system presence 95 95 0.84 0.83
   Lateral/medial midsole hardness 92 94 0.76 0.80
   Heel-foot contact hardness 95 95 0.87 0.86
Wear patterns     
   Upper wear pattern 97 93 0.73 -0.03*
   Midsole wear pattern 100 100 1.00 1.00
   Tread pattern 100 100 1.00 1.00
   Tread wear 100 100 1.00 1.00
   Outsole wear pattern 93 92 0.63 0.38*
  1. * high-agreement -low kappa paradox