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Table 3 Relation between severity of dyspnea, CRP, FEV1 and FIV1 in patients with airway obstruction

From: The added value of C-reactive protein to clinical signs and symptoms in patients with obstructive airway disease: results of a diagnostic study in primary care

Severity n CRP [mg/l]
mean (sd)
FEV1 [l]
mean (sd)
FEV1pred. [%]
mean (sd)
FIV1 [l]
mean (sd)
Smoking [py]
mean (sd)
No dyspnea 14 2.8 (1.5) 3.4 (1.0) 94.6 (22.7) 3.65 (0.8) 4.4 (6.1)
Mild 16 7.1 (9.2) 2.4 (0.9) 83.8 (16.9) 2.9 (1.1) 9.9 (20.9)
Moderate 2 6.7 (1.1) 1.8 (0.4) 69.0 (21.8) 2.6 (0.1) 5.0 (7.1)
Severe 5 11.6 (13.1) 2.1 (1.1) 82.6 (16.0) 2.5 (1.2) 12.7 (8.2)
P   0.004 0.001 0.079 0.012 0.474
  1. py = pack year