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Table 3 Binary classification to identify an exercise as correct or incorrect

From: Rehabilitation exercise assessment using inertial sensors: a cross-sectional analytical study

  Sensor position
Foot Shin Thigh Foot & shin Shin & thigh Thigh & foot All three
Heel slide
Sensitivity (%) 94 91 92 90 86 91 90
Specificity (%) 29 36 44 32 35 37 34
Accuracy (%) 76 76 79 73 72 75 74
Hip abduction
Sensitivity (%) 66 71 77 63 61 71 61
Specificity (%) 91 95 96 93 94 87 94
Accuracy (%) 87 92 94 88 89 85 89
Hip extension
Sensitivity (%) 96 84 93 84 84 98 84
Specificity (%) 99 100 100 97 100 99 100
Accuracy (%) 99 99 99 96 99 99 98
Hip flexion
Sensitivity (%) 72 73 56 74 59 70 66
Specificity (%) 92 92 91 94 90 94 92
Accuracy (%) 88 88 83 90 84 89 86
IRQ
Sensitivity (%) 86 90 92 91 91 88 90
Specificity (%) 20 28 40 31 37 41 44
Accuracy (%) 65 70 75 72 73 73 75
Knee extension
Sensitivity (%) 85 86 90 85 86 89 90
Specificity (%) 36 34 67 38 57 55 57
Accuracy (%) 71 71 83 72 77 79 80
SLR
Sensitivity (%) 64 58 72 64 71 77 69
Specificity (%) 64 58 68 62 69 74 68
Accuracy (%) 64 58 70 63 70 75 68
Average across all seven exercises
Sensitivity (%) 80 79 82 79 77 83 79
Specificity (%) 62 63 72 64 69 70 70
Accuracy (%) 79 79 83 79 81 82 81
  1. Mean Sensitivity, Specificity and Accuracy Scores for each exercise are presented.