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Table 3 Intra-rater reliability for categorical measures.

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

  % agreement Kappa
Variable Rater 1 Rater 2 Rater 1 Rater 2
Fit     
   Adequate length (palpation) 93 83 0.86 0.41
   Adequate length (straw method) 83 77 0.65 0.51
   Adequate width 92 93 0.65 0.69
   Adequate depth 97 93 0.78 0.00*
General     
   Age of shoe 97 97 0.92 0.92
   Type of shoe 100 100 1.00 1.00
   Upper materials 100 98 1.00 0.98
   Outsole materials 97 100 0.65 1.00
General structure     
   Heel height 98 95 0.94 0.83
   Forefoot height 93 97 0.78 0.87
   Longitudinal profile 100 88 1.00 0.66
   Last shape 97 97 0.48 0.65
   Fixation (outersole to midsole) 87 85 0.73 0.70
   Sole flexion point 98 98 0.91 0.92
Motion control properties     
   Dual density presence 100 100 1.00 1.00
   Fixation (upper to foot) 100 98 1.00 0.93
   Heel counter stiffness 96 96 0.87 0.86
   Midfoot sagittal stability 92 88 0.78 0.71
   Midfoot torsional stability 90 91 0.72 0.67
Cushioning     
   Cushioning system presence 98 98 0.94 0.95
   Lateral/medial midsole hardness 97 98 0.91 0.94
   Heel-foot contact hardness 98 95 0.96 0.85
Wear patterns     
   Upper wear pattern 98 92 0.85 -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 0.71 0.22*
  1. * high-agreement -low kappa paradox