Prevalence of poor sleep quality in COVID-19 patients: a systematic review and meta-analysis

Review question / Objective: The inclusion criteria for this study are based on the PICOS acronym: Participants (P): COVID-19 patients based on positive Coronavirus RT-PCR (reverse transcription-polymerase chain reaction) of nasopharyngeal and oropharyngeal swabs or a history of COVID-19 infection. Following previous research, the COVID-19 patients in this study will include the period of COVID-19 infection, symptom onset, recovery, and the onset of post-acute COVID-19 symptoms. Interventions (I): not applicable; Comparisons (C): healthy controls in comparative studies, or not applicable to epidemiological surveys; Outcome (O): the prevalence of poor sleep quality (PSQ) or available data could yield the prevalence of PSQ in COVID-19 patients. Sleep quality in COVID-19 patients will be assessed using standardized scales such as the Pittsburgh Sleep Quality Index (PSQI); Study design (S): epidemiological and comparative studies (only the baseline data of cohort study will be extracted).