Murphy - Figure 40
Absolute drop out rate 16 percent
FIG. 40: Overall, approximately 16% of the enrolled patients dropped out of the study during follow-up, a small proportion.[1] However some of the patients who dropped out of the study did so after meeting the primary outcome, and therefore in terms of power calculation, the dropout rate was 10%, well within the prespecified power calculation.
Murphy P. Chest 2017:00.
References
[1]
Murphy P, Arbane G, Bourke S, et al. Effect of home non-invasive ventilation with oxygen therapy vs oxygen therapy alone on hospital readmission or death after an acute COPD exacerbation: a randomized controlled trial. JAMA. In press.