Hart - Figure 28
50% of the patients suitable for assessment did not have persisting hypercapnia
References
[1]
Murphy PB, Rehal S, Arbane G, et al. Effect of home noninvasive ventilation with oxygen therapy vs oxygen therapy alone on hospital readmission or death after an acute COPD exacerbation: a randomized clinical trial. JAMA. Published online May 21, 2017. doi:10.1001/jama.2017.4451.