Table 4 Diagnostic performance of nurse-measured and kiosk BP values (mm Hg) with daytime ABPM reference a (N = 117)
Daytime ABPM ≥135/85 (reference) | Nurse-measured ≥ 140/90 | Kiosk I ≥135/85 | Kiosk II ≥140/90 |
|---|---|---|---|
Daytime ABPM positive for hypertension, % | 53.8 | 53.8 | 53.8 |
Sensitivity, % (95% CI) | 66.7 (53.7–78.1) | 88.9 (78.4–95.4) | 71.1 (58.7–82.1) |
Specificity, % (95% CI) | 72.2 (58.4–83.6) | 38.9 (25.9–53.1) | 66.7 (52.5–78.9) |
Positive predictive value, % (95% CI) | 73.7 (63.7–81.6) | 62.9 (57.4–68.1) | 71.4 (62.4–79.0) |
Negative predictive value, % (95% CI) | 65.0 (55.8–73.3) | 75.0 (58.1–86.7) | 66.7 (56.5–75.6) |
Positive likelihood ratio, (95% CI) | 2.40 (1.51–3.82) | 1.45 (1.16–1.83) | 2.14 (1.42–3.22) |
Negative likelihood ratio, (95% CI) | 0.46 (0.31–0.68) | 0.29 (0.13–0.62) | 0.43 (0.28–0.66) |
True positive (hypertensive), n (%) | 42 (35.9) | 56 (47.9) | 45 (38.5) |
True negative (hypertensive), n (%) | 39 (33.3) | 21 (17.9) | 36 (30.7) |
False positive, n (%) | 15 (12.8) | 33 (28.2) | 18 (15.4) |
False negative, n (%) | 21 (17.9) | 7 (6.0) | 18 (15.4) |
Accuracy, % (95% CI) | 69.2 (60.0–77.4) | 65.8 (56.5–74.3) | 69.2 (60.0–77.4) |