Skip to main content

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.