Table 5.
Results of application of the Bewick scoring system for identifying influenza A (H1N1)pdm09-related pneumonia.a, b
| Points | Bacterial n = 151 | (H1N1)pdm09 n = 90 | Mixed ((H1N1)pdm09) n = 16 | Other viruses n = 28 | Unknown etiology n = 422 |
|---|---|---|---|---|---|
| 0 | 1 (0.7) | 1 (1.1) | 0 (0) | 1 (3.6) | 10 (2.4) |
| 1 | 35 (23.2) | 2 (2.2) | 1 (6.3) | 4 (14.3) | 98 (23.2) |
| 2 | 56 (37.1) | 15 (16.7) | 2 (12.5) | 10 (35.7) | 129 (30.6) |
| 3 | 48 (31.8) | 21 (23.3) | 6 (37.5) | 9 (32.1) | 120 (28.4) |
| 4 | 9 (6) | 32 (35.6) | 5 (31.3) | 4 (14.3) | 54 (12.8) |
| 5 | 2 (1.3) | 16 (21.1) | 2 (12.5) | 0 (0) | 11 (2.6) |
| AUROC (95% CI) | NA | 0.77 (0.71–0.82) | 0.70 (0.58–0.82) | NA | NA |
AUROC, Area under receiver operating characteristic curve; CI, confidence interval; NA, not applicable.
a
Twenty-one patients were excluded from this analysis because of missing data.
b
Data from mixed (viral (no H1N1) and bacterial) were not shown.