Dados do Trabalho

Título

CORRELATION AMONG SLEEP QUALITY, EXCESSIVE DAYTIME SLEEPINESS, RESPIRATORY MUSCLE STRENGTH AND LUNG FUNCTION IN POST-COVID-19 PATIENTS

Introdução

INTRODUCTION: SARS-CoV-2 infection carries a series of acute respiratory disorders. Despite the clinical improvement, some patients still present limitations at returning to their daily living and work. They can be explained by the wide range of systemic dysfunctions, as the disease’s side effects, and may affect respiratory muscle strength, lung function and sleep quality.

Objetivo

OBJECTIVE: To evaluate the correlation among sleep quality (SQ), excessive daytime sleepiness (EDS), respiratory muscle strength (RMS) and lung function (LF) in individuals with previous COVID-19.

Métodos

METHODS: Adult volunteers with age above 18 years old, both of sexes, who were tested positive for COVID 19 were recruited. They had their respiratory muscle strength (manovacuometry) and lung function (spirometry) evaluated. Sleep was assessed subjectively by self-reported Pittsburgh Sleep Quality Index (PSQI) and by the Epworth Sleepiness Scale (ESS) and objectively for 7 following nights using actigraphy (AT053, Condor Instruments Ltda).

Resultados

RESULTS: 15 participants were studied (20% male, age 43.7±13.1 years, average time post- COVID-19 infection 13.1±7.1 months). FEV1 2.62±0.88 L (81.33±14.83 %), forced vital capacity (FVC) 3.4 ±1.1 L (87.1±13.7 %) and FEV1/FVC 0.7 ±0.12 (86.9±15.6 %). There was a negative moderate correlation between FVC and PSQI (r=-0.647; p=0.009), between FEV1/FVC and sleep latency by PSQI (r=- 0.542; p=0.037). No correlation between EDS and lung function (p=0.806) was found. Maximal inspiratory pressure was 8011±30 cmH2O (83.5±28. 9 %). Poor sleep quality was reported (PSQI 9.13±3.44), unlike excessive daytime sleepiness (7.53±5.48).

Conclusões

CONCLUSION: Our findings show a correlation between lung function and sleep quality, given that lung function impairment induced by COVID-19 infection may affect important aspects of sleep quality.

Palavras -chave

COVID-19, sleep quality, respiratory function testing, SARS-CoV-2, sleep disorders.