| All patients (n = 59) | Desaturators (n = 29) | Non-desaturators (n = 30) | p Value* | |
| PSQI | ||||
| Total score | 7 (4, 11) | 8 (4, 11) | 7 (4, 11) | 0.63 |
| CRQ† | ||||
| Dyspnoea | 16.2 (14.8, 17.7) | 16.3 (14.2, 18.3) | 16.2 (14.1, 18.3) | 0.93 |
| Emotional | 32.9 (30.9, 34.9) | 33.5 (30.3, 36.6) | 32.3 (29.7, 35.0) | 0.41 |
| Fatigue | 15.5 (14.3, 16.7) | 16.0 (14.1, 18.0) | 15.0 (13.4, 16.5) | 0.51 |
| Mastery | 19.4 (18.2, 20.6) | 19.7 (17.6, 21.7) | 19.1 (17.7, 20.5) | 0.41 |
| SF36 | ||||
| Physical functioning | 25 (10, 50) | 40 (15, 55) | 17.5 (10, 40) | 0.16 |
| Role physical | 0 (0, 50) | 25 (0, 50) | 0 (0, 25) | 0.07 |
| Pain | 74 (51, 100) | 84 (61, 100) | 74 (42, 100) | 0.27 |
| General health | 37 (25, 57) | 45 (30, 62) | 35 (20, 52) | 0.03 |
| Vitality | 50 (40, 65) | 55 (40, 70) | 50 (40, 60) | 0.33 |
| Social functioning | 75 (50, 100) | 88 (62, 100) | 75 (50, 87.5) | 0.11 |
| Role emotional | 67 (33,100) | 100 (0, 100) | 67 (33, 100) | >0.95 |
| Mental health | 76 (64, 84) | 80 (60, 84) | 74 (68, 84) | 0.75 |
| Mental score total† | 50.3 (50.0, 55.3) | 50.0 (47.6, 56.4) | 50.7 (49.8, 56.6) | 0.92 |
| Physical score total† | 30.3 (28.7,33.1) | 33.5 (31.6,36.8) | 27.2 (24.5, 30.9) | 0.007 |
| FOSQ | ||||
| General productivity | 3.9 (3.5, 4.0) | 3.9 (3.8, 4.0) | 3.7 (3.4, 4.0) | 0.11 |
| Social outcome | 4.0 (3.5, 4.0) | 4.0 (4.0, 4.0) | 4.0 (3.0, 4.0) | 0.26 |
| Activity level | 3.5 (3.1, 3.8) | 3.7 (3.2, 3.8) | 3.5 (3.0, 3.8) | 0.28 |
| Vigilance | 3.7 (3.3, 4.0) | 3.6 (3.3, 4.0) | 3.8 (3.4, 4.0) | 0.79 |
| Epworth Sleepiness Score | 5 (2, 8) | 5 (2, 8) | 5 (2, 8) | 0.88 |
| Likert scores | ||||
| Patients’ described sleep quality | 5 (4, 6) | 5 (4, 5) | 5 (4, 6) | 0.69 |
| How disturbed sleep is | 3 (2, 5) | 3 (2, 5) | 3 (2, 4) | 0.47 |
| How refreshed in the morning | 4 (2, 6) | 4 (3, 6) | 4 (2, 5) | 0.63 |
| How alert in day time | 5 (4,6) | 5 (4, 5) | 5 (4, 6) | 0.87 |
| HAD | ||||
| Anxiety score | 6 (2, 8) | 6 (2, 8) | 5.5 (3, 8) | 0.96 |
| Depression score | 4 (2, 6) | 4 (2, 6) | 4 (2, 7) | 0.36 |
*Mann–Whitney U test. ANCOVA were used to adjust the group comparisons of PSQI, CRQ, SF36 summary score total, Epworth Sleepiness Score, sleep quality and HAD by age, gender and FEV1(% predicted). The results made no difference.
†Data presented are mean (95% CI); the rest of the data are presented as median (IQR).
CRQ, Chronic Respiratory Questionnaire; FOSQ, Functional Outcomes of Sleep; HAD, Hospital Anxiety and Depression; HRQL, health related quality of life; PSQI, Pittsburgh Sleep Quality Index; SF36, Short Form 36.