Sleep quality in stable chronic obstructive pulmonary disease patients in Zagazig University Hospitals, Egypt

The Egyptian Journal of Bronchology

Table 7 Logistic regression analysis for predictors of poor sleep quality in COPD patients

Independent factors	Wald	Std. error	Standardized coefficient betas	OR (CI 95%)	P value
BMI % > 26.5	4.521	0.212	− 0.196	2.14 (1.2–8.52)	0.044*
Low FEV₁ (< 80%)	1.256	0.073	0.103	1.87 (0.85–12.5)	0.282
PH < 7.39	2.014	62.51	0.276	1.75 (0.62–5.62)	0.053
Smoking	2.142	14.25	0.054	2.85 (0.79–11.23)	0.125
PaO₂ < 86.2 (mmHg)	5.682	0.105	0.388	3.85 (1.85–13.2)	0.011*
PaCO₂ > 45.5 (mmHg)	0.954	0.185	0.037	2.11 (0.92–8.32)	0.711
ESS score > 9.8	0.854	0.256	− 0.014	3.12 (0.64–9.36)	0.868
FOSQ-10 score < 13.2	6.254	0.452	0.510	4.25 (2.1–7.58)	0.00**
Berlin score > 1	5.897	0.195	− 0.394	3.01 (1.85–13.28)	0.008*

BMI body mass index, FEV₁ forced expiratory volume at first second, PaO₂ partial arterial oxygen pressure, PaCO₂ partial arterial carbon dioxide pressure, ESS Epworth sleepiness scale, FOSQ functional outcome of sleep questionnaire
S = P value < 0.05, HS = P value < 0.001