Table 4 Multilevel likelihood ratios for hsCRP and PCT to diagnose CAP in patients with an infiltrate on chest radiography
N (%) | Sensitivity | Specificity | LR + | LR - | |
|---|---|---|---|---|---|
PCT (μg/L) | |||||
> 0.1 | 349 (89) | 0.90 | 0.39 | 1.48 | 0.25 |
> 0.25 | 280 (71) | 0.74 | 0.74 | 2.83 | 0.35 |
> 0.5 | 217 (55) | 0.57 | 0.83 | 3.30 | 0.52 |
> 1.0 | 163 (41) | 0.43 | 0.87 | 3.31 | 0.65 |
hsCRP (mg/L) | N (%) | Sensitivity | Specificity | LR + | LR - |
> 40 | 349 (89) | 0.89 | 0.17 | 1.07 | 0.65 |
> 50 | 339 (86) | 0.87 | 0.26 | 1.17 | 0.52 |
> 100 | 265 (67) | 0.69 | 0.61 | 1.76 | 0.51 |
> 200 | 136 (34) | 0.36 | 0.91 | 4.14 | 0.70 |