Figure 6.

Correlations between oxygen saturation and signs of systemic inflammation in smokers with obstructive pulmonary disease and chronic bronchitis (n=18) who displayed transcutaneous hypoxia during exacerbations.

Notes: (A) PaO₂ and blood neutrophil concentrations (ρ=0.63, P<0.01, Spearman rank correlation). (B) PaO₂ and blood concentrations of NE protein (ρ=0.56, P<0.05, Spearman rank correlation). (C) PaO₂ and blood concentrations of MPO protein (ρ=0.5, P<0.05, Spearman rank correlation).

Abbreviations: MPO, myeloperoxidase; NE, neutrophil elastase; PaO₂, partial oxygen pressure.