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Table 1 Characteristics of the 19 patients in the study

From: MMP-9, TIMP-1 and inflammatory cells in sputum from COPD patients during exacerbation

  Median IQR
Age, yr 69 63 to 74
FEV1, L (stable) 1.0 0.9 to 1.2
FEV1, % 37.6 27.3 to 46.2
FEV1/FVC 45.2 25.9 to 54.8
pO2 (kPa) 9.27 8.45 to 9.51
pCO2 (kPa) 5.66 5.49 to 6.36
O2 saturation breathing room air (%) 94 92 to 95
Reversibility to salbutamol (%) 9.7 5.0 to 13.5
  %  
Males 85  
Ex smokers 60  
Current smokers 40  
Daily taking oral steroids 5  
Daily taking inhaled steroids 90