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Table 2 Test performance characteristics for personal fitness tracker detection of tachycardia, as compared to SPO2-R

From: Use of wearable devices for post-discharge monitoring of ICU patients: a feasibility study

  Sinus rhythm Atrial fibrillation
Sensitivity 0.695 0.516
Specificity 0.988 0.995
Positive predictive value 0.948 0.983
Negative predictive value 0.914 0.804
Accuracy 0.92 0.836