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Figure 1 | Respiratory Research

Figure 1

From: Hypo- and hypercapnia predict mortality in oxygen-dependent chronic obstructive pulmonary disease: a population-based prospective study

Figure 1

PaCO 2 and adjusted mortality in oxygen-dependent COPD. Hazard ratio of death for different levels of PaCO2 (air) compared to at PaCO2 (air) = 6.5 kPa, adjusted for age, sex, PaO2 (air), WHO performance status, BMI, number of cardiovascular diagnoses, and treatment with oral glucocorticoids, benzodiazepines and opioids. Abbreviations: PaCO2 (air), Arterial blood gas tension of carbon dioxide on air; PaO2 (air), Arterial blood gas tension of oxygen on air; WHO, World Health Organization; BMI, Body Mass Index.

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