Table 1 Diagnosing AF with and without clinician over-read of unclassified readings, against ECG as gold standard KB Sensitivity (%) Specificity (%) PPV (%) NPV (%) PLR NLR Accuracy (%) Kappa 95% CI P value Consecutive unclassified excluded 94.4 90.7 72.3 98.4 10.2 0.06 91.5 0.76 0.67 to 0.88