Table 7

Associations between outcomes and oxygen usage

Variable*No oxygen (n=111)Oxygen (n=xx71)Difference (95% CI)P value†
Mean emPHasis-10 score (SD)‡22.5 (12.0)32.5 (8.4)7.4 (5.0 to 9.9)<0.001
Mean FSS score (SD)‡4.5 (1.7)5.5 (1.4)0.8 (0.5 to 1.2)<0.001
Mean MOS-Sleep Index (SD)‡37.2 (19.6)42.2 (18.6)3.1 (−1.2 to 7.4)0.16
Mean HADS-Anxiety score (SD)‡5.8 (4.4)8.0 (4.3)1.6 (0.7 to 2.6)0.001
Mean HADS-Depression score (SD)‡4.6 (3.4)7.1 (3.7)1.7 (0.9 to 2.5)<0.001
Median Dyspnoea-12 score (IQR)§6 (1–14)15 (9–22)1.93 (1.55 to 2.42)<0.001
  • *Mean values for total scores across all time points combined.

  • †P values indicate significance of the overall difference between the four time points.

  • ‡For variables found to be approximately normally distributed, mean and SD were summarised: mean difference using oxygen versus no oxygen.

  • §For the variable found to be non-normally distributed, the median and IQR preferred was summarised, and the ratio of scores in participants using oxygen versus no oxygen is reported on a log scale.

  • FSS, Fatigue Severity Scale; HADS, Hospital Anxiety and Depression Scale; MOS, Medical Outcomes Study.