Health‐related quality of life (HRQL) measures for 41 patients
| Baseline | Δ cylinder oxygen‐cylinder air | p‐value | |
| Disease specific HRQL | |||
| CRQ# | |||
| Dyspnoea (5–35) | 16.6 (5.3) | 2.0 (0.9) | 0.02 |
| Fatigue (4–28) | 15.3 (4.9) | 1.8 (0.7) | 0.02 |
| Emotional function (7–49) | 34.3 (8.0) | 3.3 (1.2) | 0.006 |
| Mastery (4–28) | 19.5 (4.8) | 1.8 (0.7) | 0.008 |
| Total (20–140) | 85.8 (18.5) | 8.8 (2.8) | 0.002 |
| HAD¶ | |||
| Anxiety (0–21) | 5.6 (4.1) | −1.6 (0.6) | 0.009 |
| Depression (0–21) | 4.3 (2.5) | −1.0 (0.5) | 0.05 |
| Generic HRQL | |||
| SF-36# | |||
| Physical functioning (0–100) | 33.0 (18.8) | 1.6 (3.5) | 0.6 |
| Role physical (0–100) | 15.2 (27.3) | 16.8 (5.5) | 0.01 |
| Bodily pain (0–100) | 73.4 (26.3) | 5.3 (5.0) | 0.3 |
| General health (0–100) | 42.9 (22.8) | 6.1 (2.9) | 0.04 |
| Vitality (0–100) | 48.3 (20.5) | 2.9 (3.0) | 0.3 |
| Social functioning (0–100) | 67.1 (24.2) | 10.5 (5.2) | 0.05 |
| Role emotional (0–100) | 60.2 (44.2) | 18.3 (7.7) | 0.02 |
| Mental health (0–100) | 75.6 (14.7) | 4.0 (2.7) | 0.1 |
Data are presented as mean (sd) for baseline and mean (se) for Δ cylinder oxygen-cylinder air
CRQ: chronic respiratory questionnaire
HAD: hospital anxiety and depression
SF-36: short-form-36 health survey questionnaire
#: higher scores indicate better HRQL
¶: higher scores indicate worse emotional function