Table 2. Performance characteristics of the derived ARI classifier.
A combination of the Bacterial ARI, Viral ARI, and Non-Infectious Illness classifiers were validated using leave-one-out cross-validation in a population of bacterial ARI (n=70), viral ARI (n=115), or non-infectious illness (n=88). Three published bacterial vs. viral classifiers were identified and applied to this same population as comparators. Data are presented as number (%). Shaded cells indicate correct classifications.
| Clinical Assignment | |||||
|---|---|---|---|---|---|
| Bacterial | Viral | Non-infectious illness |
|||
| Ramilo et al. | Bacterial | 54 (77.1) | 4 (3.5) | 12 (13.6) | Classifier-Predicted Assignment |
| Viral | 6 (8.6) | 101 (87.8) | 12 (13.6) | ||
| Non-infectious illness | 12 (14.3) | 12 (8.7) | 64 (72.7) | ||
| Hu et al. | Bacterial | 53 (75.7) | 4 (3.5) | 9 (10.2) | |
| Viral | 9 (12.9) | 104 (90.4) | 9 (10.2) | ||
| Non-infectious illness | 8 (11.4) | 7 (6.1) | 70 (79.5) | ||
| Parnell et al. | Bacterial | 51 (72.8) | 8 (7.0) | 11 (12.5) | |
| Viral | 13 (18.6) | 94 (81.7) | 10 (11.4) | ||
| Non-infectious illness | 6 (8.6) | 13 (11.3) | 67 (76.1) | ||
| Derived ARI Classifier |
Bacterial | 58 (82.8) | 4 (3.4) | 8 (9.0) | |
| Viral | 9 (12.8) | 104 (90.4) | 4 (4.5) | ||
| Non-infectious illness | 3 (4.2) | 7 (6.0) | 76 (86.3) | ||