Table 2 Demographic and clinical characteristics according to sleep quality evaluated by the PSQI and CASIS questionnaires.

From: Poor sleep quality, COPD severity and survival according to CASIS and Pittsburgh 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

  1. Data are presented as mean (SD) or n (%).
  2. 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).
Back to article page