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Table 1 Temperature Sensor and Self-Reported Sling Wear Timesa

From: An accurate method of measuring shoulder sling compliance: a validation study

  Locationb
Bolster Medial Elbow Palmar Aspect
Total actual wear time logged by volunteers, h 171.63 171.63 171.63
Total time sensor on, h 1101.5 1101.5 1101.25
Total estimated time (h) logged by sensor/algorithm 167.75 171.00 172.25
True positives, h 167.25 166.5 168.5
True negatives, h 928.75 924.75 924.75
False positives, h 0.5 4.5 3.75
False negatives, h 5 5.75 4.25
Sensitivity (TP) / (TP + FN), % 97.1 96.7 97.5
Specificity (TN) / (FP + TN), % 99.9 99.5 99.6
Positive predictive value (TP) / (TP + FP), % 99.7 97.4 97.8
Negative predictive value (TN) / (FN + TN), % 99.5 99.4 99.5
Diagnostic accuracy (TP + TN) / (TP + TN + FP + FN), % 99.5 99.1 99.3
  1. aSling wear times are provided as the sum of the four volunteers included in the study.
  2. bBolster, inner aspect of the bolster that is in contact with the abdomen; Medial Elbow, inner aspect of the sling at the medial elbow; Palmar Aspect, inner aspect of the sling at the palmar aspect of the carpometacarpal joint.