Table 4

Differences between diagnostic categories

Viral infectionAsthmaPneumonia (uncomplicated/ undifferentiated)Pneumonia (complicated by effusion)Other
Count (%)50 (22)63 (29)81 (37)12 (5.4)15 (6.8)
Mean WBC (SD)12.1 (4.3)13.6 (5.0)13.0 (8.1)19.0 (11.0)*12.8 (7.5)
missing11100
Median CRP (mg/L) (IQR)12.6 (3.5–28.6)7.0 (3.6–16.4)45.5 (15.2–103)†203.8 (146.8–274.7)‡23.6 (14.6–80.2)
missing28473142
No respiratory virus detected5 (10)18 (29)32 (40)9 (75)8 (53)
missing00000
Median duration of antibiotics (days) (IQR)2 (0–4)§0 (0–1)§7 (7–10)23 (14–27)¶10 (7–14)
missing00000
  • *Mean of complicated pneumonia group significantly greater than that of the others (p=0.002).

  • †Median of pneumonia group significantly greater than that of the viral infection group (p=0.007) and the asthma group (p=0.0009) but significantly lower than that of the complicated pneumonia group (p=0.02).

  • ‡Median of complicated pneumonia group significantly greater than those of the viral infection and the asthma group (p<0.0001) and the pneumonia group (p=0.009).

  • §Median of the viral infection and asthma groups significantly smaller than those of all other groups (p<0.0001).

  • ¶Median of the complicated pneumonia group also significantly higher than that of the pneumonia group (p=0.02).

  • CRP, C reactive protein; WBC, white blood cell.