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Table 8 Specific items on COPD Assessment Test between patients with COPD with poor sleep quality (PSQI > 5) and those without poor sleep quality

From: Factors responsible for poor sleep quality in patients with chronic obstructive pulmonary disease

  With poor sleep quality (N = 86) Without poor sleep quality (N = 45) P-value
Cough 2.0 ± 1.7 1.6 ± 1,3 0.123
Phlegm* 2.4 ± 1.6 1.8 ± 1.5 0.030
Chest tightness 1.4 ± 1.4 1.1 ± 1.5 0.286
Breathlessness 2.4 ± 1.7 2.2 ± 1.9 0.558
Activities 1.0 ± 1.4 1.0 ± 1.6 0.805
Confidence 1.1 ± 1.5 1.1 ± 1.7 0.953
Sleep* 2.1 ± 1.9 0.7 ± 1.4 <0.001
Energy 1.8 ± 1.6 1.4 ± 1.7 0.176
CAT score* 14.4 ± 8.1 11.0 ± 7.9 0.022
  1. *p < 0.05