Table 3.
Diagnostic Test Results of Facial and Fingertip Photoplethysmography in Detecting AF
| Variable | Facial Photoplethysmography | Fingertip Photoplethysmography | ||
|---|---|---|---|---|
| Estimate | 95% CI | Estimate | 95% CI | |
| Sensitivity, % | 94.7 | 87.1–97.9 | 94.7 | 87.1–97.9 |
| Specificity, % | 95.8 | 91.1–98.1 | 93.0 | 87.5–96.1 |
| Positive predictive value, % | 92.2 | 84.4–96.3 | 87.7 | 79.6–92.8 |
| Negative predictive value, % | 97.1 | 92.9–98.9 | 97.1 | 92.7–98.9 |
| Positive likelihood ratio | 22.4 | 10.2–49.1 | 13.4 | 7.4–24.5 |
| Negative likelihood ratio | 0.06 | 0.02–0.15 | 0.06 | 0.02–0.15 |
| Diagnostic odds ratio | 402.3 | 109.9–1472.3 | 234.3 | 70.9–773.9 |
| Prevalence, % | 34.6 | 28.3–41.3 | 34.6 | 28.3–41.3 |
| Cohen's κ coefficient | 0.90 | 0.84–0.96 | 0.86 | 0.79–0.93 |
| Predictive accuracy, %a | 95.4 | 93.5 | ||
AF indicates atrial fibrillation; and CI, confidence interval.
a
The sum of true positives and true negatives divided by the total number of tests.