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Figure 2 Relationship between number of neutrophils in the blood and FEV1 % predicted. A significant negative relationship was seen between the absolute number of neutrophils in peripheral blood and severity of airway obstruction as assessed by FEV1 % predicted in both (A) patients with COPD (n = 18, r = −0.489, p = 0.039) and (B) control subjects (n = 21, r = −0.438, p = 0.047).
