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Table 4 Associations between laboratory findings, clinical outcomes, pneumonia and presence of a virus in hospital episodes with respiratory symptoms

From: Respiratory tract virus infections in the elderly with pneumonia

  Pneumonia+/virus+ (1) Pneumonia+/virus- (2) Pneumonia−/virus+ (3) Pneumonia−/virus- (4) P (1vs2) P (1vs3) P (3vs4) P (1vs4)
WBC over 15 7 (21%) 22 (29%) 8 (7.5%) 30 (19%) 0.4 0.03 0.01 0.8
CRP over 100 24 (71%) 47 (60%) 40 (37%) 80 (49%) 0.3 0.001 0.06 0.02
Had a revisit 11 (32%) 26 (33%) 32 (30%) 67 (41%) 0.9 0.8 0.06 0.3
Over 13 nights at ward 11 (32%) 23 (29%) 28 (26%) 59 (36%) 0.8 0.5 0.08 0.7
Death at ward 1 (2.9%) 10 (13%) 7 (6.5%) 11 (6.8%) 0.1 0.4 0.9 0.4
  1. χ2 test and Fischer exact test (when counts < 5)
  2. Significant values are shown bold and italic
  3. Pneumonia + Episodes with pneumonia, Pneumonia- Episodes without pneumonia, Virus + Episodes with a virus detected, Virus- Episodes without a virus detected, CRP C-reactive protein (mg/l), WBC White blood cell count (×109/L)