Table 5.
Accuracy of the Markov Model Designed to Detect Pulse Irregularities Attributable to AF and of Literature Algorithms According to MIT‐BIH AF Data Set
| Algorithm/Feature | Accuracy % (CI) | Sensitivity % (CI) | Specificity % (CI) | PPV % (CI) | NPV % (CI) |
|---|---|---|---|---|---|
| Markov model | |||||
| Average | 94±12 (89–98) | 84±21 (77–90) | 98±5 (96–100) | 90±21 (80–96) | 92±14 (87–97) |
| Gross | 94 | 86 | 99 | 98 | 91 |
| NADev | |||||
| Average | 94±6 (92–96) | 95±6 (93–98) | 89±17 (82–95) | 67±36 (52–80) | 97±6 (95–99) |
| Gross | 94 | 98 | 92 | 89 | 99 |
| NADiff | |||||
| Average | 92±13 (86–97) | 92±16 (85–97) | 92±15 (87–97) | 80±30 (69–93) | 95±11 (91–99) |
| Gross | 92 | 91 | 93 | 89 | 94 |
| COSen | |||||
| Average | 91±9 (85–94) | 89±10 (85–92) | 88±16 (82–94) | 66±35 (48–78) | 91±16 (86–97) |
| Gross | 91 | 91 | 90 | 86 | 94 |
| Multiparametric | |||||
| Average | 95±8 (91–97) | 96±7 (94–99) | 91±15 (85–97) | 73±31 (57–84) | 98±4 (96–100) |
| Gross | 95 | 98 | 93 | 90 | 98 |
Average, indicates accuracy described by mean ± SD of the value across patients; Gross, accuracy determined by aggregating results from each patient into one; AF indicates atrial fibrillation; CI, 95% confidence interval of the mean as obtained by bootstrapping and resampling of the data set (100 iterations); NPV, negative predictive value; PPV, positive predictive value. Average indicates accuracy described by meanSD of the value across patients. Any AF event <1 minute was removed from the analysis, and 1 record (5091) was discarded because AF was only present for <1 minute.