Sleep quality in COPD patients: correlation with disease severity and health status

Danielle Cristina Silva Clímaco, Thais C Lustosa, Marcus Vinícius de França Pereira Silva, Ozeas L Lins-Filho, Valesca Kehrle Rodrigues, Luiz de Albuquerque P de Oliveira-Neto, Audes Diógenes Magalhães Feitosa, Fernando José Pinho Queiroga Jr, Marília Montenegro Cabral, Rodrigo P Pedrosa, Danielle Cristina Silva Clímaco, Thais C Lustosa, Marcus Vinícius de França Pereira Silva, Ozeas L Lins-Filho, Valesca Kehrle Rodrigues, Luiz de Albuquerque P de Oliveira-Neto, Audes Diógenes Magalhães Feitosa, Fernando José Pinho Queiroga Jr, Marília Montenegro Cabral, Rodrigo P Pedrosa

Abstract

Objective: To evaluate clinical predictors of poor sleep quality in COPD patients with and without obstructive sleep apnea (OSA).

Methods: Consecutive stable patients with COPD were evaluated for OSA by means of overnight polysomnography; for sleep quality by means of the Pittsburgh Sleep Quality Index (PSQI); and for disease impact by means of the COPD Assessment Test. COPD severity was graded in accordance with the 2020 GOLD guidelines. Predictors of poor sleep quality were evaluated by multivariate logistic regression analysis.

Results: We studied 51 patients with COPD alone and 51 patients with COPD and OSA. Both groups had similar age (66.2 ± 9.2 years vs. 69.6 ± 10.7, p = 0.09) and airflow limitation (p = 0.37). Poor sleep quality was present in 74.8% of the study participants, with no significant difference between COPD patients with and without OSA regarding PSQI scores (p = 0.73). Polysomnography showed increased stage 1 non-rapid eye movement sleep and arousal index, as well as reduced sleep efficiency and stage 3 non-rapid eye movement sleep, in the group of patients with COPD and OSA (p < 0.05). Independent predictors of poor sleep quality were GOLD grade C/D COPD (OR = 6.4; 95% CI, 1.79-23.3; p < 0.01), a COPD Assessment Test score ≥ 10 (OR = 12.3; 95% CI, 4.1-36.5; p < 0.01), and lowest SaO2 < 80% (p < 0.0001).

Conclusions: Poor sleep quality is quite common in patients with COPD and is associated with severe COPD and poor health status, having a negative impact on overall quality of life. Despite changes in polysomnography, OSA appears to have no impact on subjective sleep quality in COPD patients.

Conflict of interest statement

CONFLICT OF INTEREST: None declared.

Figures

Figure 1. Flow chart of the study…
Figure 1. Flow chart of the study design. PSG: polysomnography.

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