Development and Relevance of Hypercapnia in COPD

Figure 1

Cox regression for mortality in AATD and COPD. (a) AATD, hypercapnia and survival, (b) AATD, increasing CO₂ and survival, (c) COPD, hypercapnia and survival, (d) COPD, increasing CO₂ and survival.

(a)

(b)

(c)

(d)