Table 5.
Test characteristics of the AT RISK score
| AT RISK | Sensitivity | Specificity | Negative Predictive Value | Positive Predictive Value |
|---|---|---|---|---|
| ≥1 (n = 418) | 100 (100–100) | 2.4 (0.9–4.2) | 100 (100–100) | 22.2 (18.5–26.2) |
| ≥2 (n = 373) | 98.9 (96.4–100) | 15.6 (11.3–19.5) | 98.1 (93.2–100) | 24.7 (20.4–28.8) |
| ≥3 (n = 223) | 76.3 (68.1–85.4) | 54.4 (49.2–59.8) | 89.2 (84.5–93.5) | 31.8 (26.7–37.6) |
| ≥4 (n = 78) | 39.8 (30.9–50.6) | 87.7 (84.4–90.8) | 83.9 (79.5–87.8) | 47.4 (37.1–59.1) |
| ≥5 (n = 9) | 5.4 (1.1–10.8) | 99.7 (97.6–100) | 78.9 (75–82.8) | 55.6 (25–100) |
Definition of abbreviations: AT RISK = Age, Trainee, Race, Indication, SpO2, kg/m2; SpO2 = arterial oxygen saturation as measured by continuous pulse oximetry.
Test characteristics in the cohort expressed by % (95% confidence intervals) at different thresholds of AT RISK scores. The number of patients in the cohort with each score was: AT RISK 0, n = 8; AT RISK 1, n = 45; AT RISK 2, n = 150; AT RISK 3, n = 145; AT RISK 4, n = 69; AT RISK 5, n = 8; and AT RISK 6, n = 1.