Comparison of DECAF and OCRS scores and current practice in predicting poor outcomes
| Method | Sensitivity | Specificity | NPV | PPV | Accuracy | |
| Current practice | 71.0 (58.05–81.8) | 86.6 (81.6–90.6) | 92.0 (88.6–94.4) | 57.9 (49.0–66.3) | 83.3 (78.6–87.4) | |
| Score cut-off | ||||||
| 0 | DECAF | 88.7 (78.1–95.3) | 34.5 (28.4–40.9) | 92.1 (85.1–96.0) | 26.1 (23.7–28.6) | 45.7 (39.9–51.5) |
| OCRS | 96.8 (88.8–99.6) | 18.5 (13.8–24.0) | 95.7 (84.6–98.9) | 23.6 (22.3–25.0) | 34.7 (29.3–40.4) | |
| <2 | DECAF | 69.3 (56.4–80.4) | 74.8 (68.8–80.2) | 90.4 (86.5–93.2) | 41.8 (35.3–48.5) | 73.7 (68.3–78.6) |
| OCRS | 82.3 (70.5–90.8) | 56.7 (50.2–63.1) | 92.5 (87.7–95.5) | 33.1 (29.1–37.4) | 62.0 (56.2–67.5) | |
| <3 | DECAF | 41.9 (29.5–55.2) | 92.0 (87.8–95.1) | 85.9 (83.1–88.3) | 57.8 (44.8–69.7) | 81.7 (76.8–85.9) |
| OCRS | 71.0 (58.1–81.8) | 73.5 (67.4–79.0) | 90.7 (86.7–93.5) | 41.1 (34.9–47.7) | 73.0 (67.6–77.9) |
Data presented as % (95% CI). NPV: negative predictive value; PPV: positive predictive value; DECAF: Dyspnea, Eosinopenia, Consolidation, Acidemia, and Atrial Fibrillation; OCRS: Ottawa Chronic Obstructive Pulmonary Disease Risk Scale.