Diagnostic performance of WatchBP and Omron autoanalysis for detecting atrial fibrillation
| n=999* Prevalence 7.9% | WatchBP with AF indicator flash (95% CI) | Omron autoanalysis* (95% CI) |
|---|---|---|
| Sensitivity (%) | 94.9 (87.5 to 98.6) | 98.7 (93.2 to100) |
| Specificity (%) | 89.7 (87.5 to 91.6) | 76.2 (73.3 to 78.9) |
| Positive likelihood ratio | 9.2 (7.6 to 11.2) | 4.15 (3.69 to 4.67) |
| Negative likelihood ratio | 0.057 (0.022 to 0.15) | 0.017 (0.0024 to 0.12) |
| Positive predictive value | 44.1 (36.5 to 51.9) | 26.3 (21.3 to 31.7) |
| Negative predictive value | 99.5 (98.8 to 99.9) | 99.9 (99.2 to 100) |
*Text message ‘irregular’ or ‘analysis impossible’ counted as positive test.
AF, atrial fibrillation.