Laboratory findings and combinations of chest radiographic and laboratory findings in 215 children with community acquired pneumonia
| Total n (%) | Total bacterial n (%) | Exclusively viral n (%) | p Value | Sensitivity (bacterial) | Specificity (bacterial) | |
|---|---|---|---|---|---|---|
| WBC=white blood cells; ESR=erythrocyte sedimentation rate; CRP=C reactive protein. | ||||||
| *Includes mixed interstitial and alveolar infiltrates; †sensitivity and specificity for viral pneumonia. | ||||||
| 215 (100) | 134 (100) | 81 (100) | ||||
| WBC >15.0 × 109/l | 102 (47) | 64 (48) | 38 (47) | NS | 0.48 | 0.53 |
| ESR >30 mm/h | 137 (64) | 88 (66) | 49 (60) | NS | 0.66 | 0.40 |
| CRP <20 mg/l | 57 (27) | 30 (22) | 27 (33) | NS | 0.33† | 0.78† |
| CRP >40 mg/l | 127 (59) | 89 (66) | 38 (47) | 0.004 | 0.66 | 0.53 |
| CRP >80 mg/l | 93 (43) | 70 (52) | 23 (28) | 0.001 | 0.52 | 0.72 |
| <2 years of age | 23 (11) | 18 (13) | 5 (6) | 0.003 | 0.35 | 0.90 |
| ≥2 years of age | 70 (33) | 52 (39) | 18 (22) | NS | 0.63 | 0.44 |
| CRP >120 mg/l | 60 (28) | 48 (36) | 12 (15) | 0.001 | 0.36 | 0.85 |
| Alveolar infiltrates* + CRP >80 mg/l | 80 (37) | 62 (46) | 18 (22) | 0.001 | 0.46 | 0.78 |