Variable | | Univariate | | | Multivariate* | |
| OR | 95% CI | p-value | OR | 95% CI | p-value |
Age ≥ 50 years | 2.47 | 1.1-5.5 | 0.028 | 3.16 | 1.1-8.4 | 0.021 |
Prior antibiotic treatment | 0.26 | 0.06-1.1 | 0.070 | | | |
Pleuritic pain | 2.50 | 1.02-6.1 | 0.044 | 4.06 | 1.3-11.8 | 0.010 |
C-reactive protein ≥22.9 mg/dL | 8.81 | 3.4-22.7 | 0.001 | 10.08 | 3.7-27.2 | 0.001 |
WBC count ≥10 x 109/L | 2.28 | 0.8-5.8 | 0.087 | | | |