Table 2.
Demographic and clinical characteristics according to sleep quality evaluated by the PSQI and CASIS questionnaires.
| Variables | PSQI Good Sleepers n = 100 | PSQI Poor Sleepers n = 100 | p | CASIS Good Sleepers n = 116 | CASIS Poor Sleepers n = 84 | p |
|---|---|---|---|---|---|---|
| Age | 67.6 (8.2) | 63.9 (9.4) | 0.0038 | 66.7 (8.5) | 64.5 (9.5) | 0.0844 |
| Sex (male) | 76 (76%) | 63 (63%) | 0.046 | 89 (76.7%) | 50 (59.5%) | 0.009 |
| BMI (kg/m2) | 26.7 (5.2) | 25.5 (4.7) | 0.0719 | 26 (4.5) | 26.2 (5.6) | 0.7053 |
| Smokers (current) | 21 (21%) | 34 (34%) | 0.040 | 28 (24.1%) | 27 (32.1%) | 0.211 |
| Pack-years | 52.2 (32.7) | 45.3 (27) | 0.1068 | 48.3 (29.6) | 49.3 (30.9) | 0.8265 |
| Charlson Index | 4.1 (1.6) | 3.7(1.7) | 0.0877 | 3.9 (1.8) | 3.9 (1.6) | 0.8757 |
| Osteoarticular pain | 7 (7%) | 22 (22%) | 0.003 | 18 (15.5%) | 11 (13.1%) | 0.780 |
| Lower urinary tract symptoms | 16 (16%) | 28 (28%) | 0.041 | 28 (24.1%) | 16 (19%) | 0.391 |
| Exacerbators | 46 (46%) | 48 (48%) | 0.777 | 46 (39.7%) | 48 (57.1%) | 0.014 |
| BODEx | 2.3 (1.8) | 2.9 (2.1) | 0.0387 | 2.3 (1.9) | 3.1 (1.9) | 0.0047 |
| FEV1 mL | 1398 (595) | 1425 (659) | 0.7651 | 1465.8 (679.2) | 1337.3 (540.1) | 0.1525 |
| FEV1% | 50.3 (16.5) | 50.3 (19.4) | 0.9759 | 50.8 (18.3) | 49.7 (17.5) | 0.6744 |
| 6MWT (meters) | 378 (76) | 359 (91) | 0.2296 | 387.1 (80.3) | 347 (80.7) | 0.0099 |
| mMRC | 1.2 (0.8) | 1.6 (0.9) | 0.0013 | 1.2 (0.8) | 1.8 (0.8) | < 0.0001 |
| CAT | 10.4 (6.3) | 17.3 (0.8) | < 0.001 | 10 (6.1) | 19.2 (8.2) | < 0.0001 |
| CAT item 7 | 0.3 (0.9) | 1.5 (1.8) | < 0.001 | 0.2 (0.7) | 1.9 (1.9) | < 0.0001 |
| PSQI | 3 (1.3) | 9.3 (3.2) | < 0.001 | 4.9 (3.4) | 7.9 (4.3) | < 0.0001 |
| CASIS | 6.9 (11.5) | 22.8 (25.7) | < 0.001 | 1.6 (3.2) | 33.1 (22.4) | < 0.0001 |
| STOP-Bang | 2.5 (1.6) | 2.7 (1.7) | 0.6104 | 2.7 (1.5) | 2.5 (1.9) | 0.3706 |
| HADS_A | 4.3 (3.5) | 8.1 (4.5) | < 0.001 | 5 (3.9) | 7.8 (4.7) | < 0.0001 |
| HADS_D | 3.5 (3.1) | 6.8 (4.8) | < 0.001 | 3.6 (3.6) | 7.2 (4.4) | < 0.0001 |
Data are presented as mean (SD) or n (%).
BMI body mass index, BODEx Body mass index, airflow Obstruction, Dyspnea and Exacerbations index, FEV1 forced expiratory volume in 1 s, FEV1% FEV1 percentage of predicted, 6MWT 6 min walking test, mMRC modified Medical Research Council scale of dyspnea, CAT COPD assessment test, PSQI Pittsburgh Sleep Quality Index, CASIS COPD and Asthma Sleep Impact Scale, HADS Hospital Anxiety and Depression scale for the presence of symptoms of anxiety (HADS_A) and depression (HADS_D).