Table 4

Correlations between change in sputum endothelin-1 (ET-1) levels and changes in other measured parameters between stable state and exacerbation; paired sputum subsets (n=14)

Change in sputum ET-1
r p value
Plasma ET-1 (pg/ml)0.9170.001
Sputum IL-6 (pg/ml)0.7180.013
Sputum IL-8 (pg/ml)0.1180.729
Sao 2 (kPa)–0.0090.976
FEV1 (l)0.4520.260
PEF (l/s)–0.1430.736
  • FEV1 = forced expiratory volume in one second; PEF = peak expiratory flow; Sao2 = oxygen saturation; IL = interleukin.