Table 3.
Subgroup Interval‐Level Sensitivity and Specificity by AF Burden
| Subgroup | Sensitivity (95% CI) | Specificity (95% CI) |
|---|---|---|
| AF burden decile | ||
| Highest decile (≥25.4% burden) (N=12) | 98.8 (97.8–99.5) | 90.3 (77.4–99.8) |
| Not highest decile (<25.4% burden) (N=99) | 81.6 (69.1–90.6) | 98.5 (97.8–99.3) |
| Age group | ||
| <65 y (N=45 subjects) | 94.9 (84.1–98.7) | 99.1 (98.5–99.9) |
| 65–74 y (N=43 subjects) | 95.3 (83.7–98.1) | 98.4 (97.5–99.6) |
| ≥75 y (N=23 subjects) | 98.4 (95.8–99.4) | 95.4 (92.2–98.9) |
| Racial group | ||
| Asian (N=6) | 98.7 (97.7–99.4)* | 100.0 (98.7–100.0)* |
| Black/African American (N=13) | 67.5 (55.4–83.5) | 99.1 (98.8–99.5) |
| Native Hawaiian or other Pacific Islander (N=1) | NA | 100.0 (99.6–100.0)* |
| White (N=86) | 97.2 (95.0–98.4) | 97.8 (96.7–99.0) |
| Other (N=5) | NA | 100.0 (99.9–100.0)* |
AF indicates atrial fibrillation; and NA, not assessable.
*
Due to absent or low error counts, CIs for sensitivity and/or specificity for some groups (Asian, Native Hawaiian/Pacific Islander groups, or Other) are reported based on the exact binomial rather than cluster bootstrap.