The Relationship of Partial Pressure of Carbon Dioxide (PaCO₂) with Disease Severity Indicators Such as BODE and GOLD in Hospitalized COPD Patients

Figure 3

ROC curves of the PaCO₂ for higher BODE index (BODE ≥5) and higher GOLD index (GOLD ≥3) of COPD patients. (a) The area under ROC curve: 0.748; 95% CI: 0.630–0.866;  = 0.001. (b) The area under ROC curve: 0.755; 95% CI: 0.643–0.867;  < 0.001.

(a)

(b)