Bronchiolitis obliterans syndrome is a clinical diagnosis based on lung function parameters. Using induced sputum, taken from lung transplant recipients, this paper reports on the correlation between the neutrophil count and the percentage change from postoperative baseline for FEV(1), FEF(50), and FEF(25-75). In double lung transplant recipients the correlations were significant for FEV(1) (r = -0.68, p = 0.002), FEF(50) (r = -0.65, p = 0.016), and FEF(25-75) (r = -0.56, p = 0.016). In single lung transplant recipients, no significant correlations were seen.
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