Fig. 3. Subgroup analysis of sequelae of COVID-19 by mean age, sex proportion, region of studies, severity of disease and follow-up duration.

NS No. of studies, NP No. of participants. COVID-19 survivors of senior age, male sex, living in a high-income country, had a more severe health statuses at acute infection and within 6 months since recovery appeared to have higher prevalence of long-term sequelae than their contrast groups; A Subgroup analysis among different follow-up duration; B Subgroup analysis among asymptomatic participants in the community, mild/moderate patients and severe patients in hospital; C Subgroup analysis by mean age of participants; D Subgroup analysis by sex proportion of studies; E Subgroup analysis between high-income country and middle or low-income country.