Sleep disturbances following recovery from COVID-19: a comparative cross-sectional study in Egypt

Sequelae from COVID-19 are increasingly being reported, but sleep disturbances after recovery from the disease have had little attention.

This study aimed to identify and compare sleep disturbances and associated correlates among adults who have recovered from COVID-19 with those who have never been infected with the disease.

The sample included 85 adults who have recovered from COVID-19 and 85 adults who have never been infected (matched on age, sex, education and socioeconomic level). Individuals were recruited from Zagazig University Hospitals, Egypt from 1 September to 29 November 2020. Participants were interviewed using a sociodemographic and clinical checklist, the Pittsburgh Sleep Quality Index and the Hospital Anxiety Depression Scale.

Most (77%) of the recovered cases had experienced sleep disturbances, compared with 46% of controls. Individuals who had recovered from COVID-19 were more likely to have poor subjective sleep quality (odds ratio (OR) 1.5, 95% confidence interval (CI): 1.1-2.1), prolonged sleep latency (OR 1.8, 95% CI: 1.3-2.6), shorter sleep duration (OR 1.6, 95% CI: 1.1-2.2), reduced sleep efficiency (OR 3.8, 95% CI: 2.0-7.1), frequent daytime dysfunction (OR 1.9, 95% CI: 1.2-3.1) and poor global Pittsburgh Sleep Quality Index score (OR 3.0, 95% CI: 1.5-6.0). Depressive (P = 0.002) and anxiety (P = 0.003) symptoms were associated with a poor global Pittsburgh Sleep Quality Index score among recovered female participants (P = 0,034) who had low-to-medium education level (P = 0.004).

Further studies (e.g. population-based longitudinal studies) are needed on sleep disturbances as a potential sequelae of COVID-19, because it can impair mental and physical well-being.