(A) Distribution of patient results using each of the three screening methods, n=531. (B) Comparison of performance of three different ED screening methods, n=531
| A | ||||||
| NTS COVID-19 positive | NTS COVID-19 negative | ROS COVID-19 positive | ROS COVID-19 negative | Attending physician PA COVID-19 positive | Attending physician PA COVID-19 negative | |
| COVID-19 test positive | 50 | 58 | 57 | 51 | 67 | 41 |
| COVID-19 test negative | 124 | 299 | 160 | 263 | 102 | 321 |
| B | ||||
| Sensitivity (95% CI) | Specificity (95% CI) | PPV (95% CI) | NPV (95% CI) | |
| NTS | 0.46 (0.37 to 0.56) | 0.71 (0.66 to 0.75) | 0.29 (0.23 to 0.36) | 0.84 (0.80 to 0.87) |
| ED ROS | 0.53 (0.43 to 0.62) | 0.62 (0.58 to 0.67) | 0.26 (0.21 to 0.33) | 0.84 (0.79 to 0.88) |
| Attending physician PA | 0.62 (0.53 to 0.71) | 0.76 (0.72 to 0.80) | 0.40 (0.33 to 0.47) | 0.89 (0.85 to 0.92) |
NPV, negative predictive value; NTS, nursing triage screen; PA, probability assessment; PPV, positive predictive value; ROS, review of systems.