Figure 4.

Fitted data on mMRC score (A), SGRQ (B), arterial partial pressure of CO₂ (C) and 6MWT (D), in high-flow, humidified, nasal cannula delivered oxygen (HFNC) patients (red solid line) or controls (blue dashed lines) during the study.

Notes: Dots represent assessment times. p-values show differences between the HFNC and control groups.

Abbreviations: HFNC, high-flow nasal cannula; mMRC, modified Medical Research Council; 6MWT, 6-minute walk test; SE, standard error; SGRQ, St George’s Respiratory Questionnaire.