Features and risk factors of post-COVID-19 syndrome: findings from a longitudinal study in Bangladesh.

Background: A comprehensive study of the post-COVID syndrome (PCS) remains scarce in low-and middle-income countries. We assessed the prevalence, incidence rate, evolution over time, and risk factors of PCS among hospitalized (HS) and non-hospitalized (NHS) COVID-19 survivors. Methods: We undertook a prospective longitudinal study of COVID-19 survivors at months 1, 3, and 5 post-discharge or post-isolation period. The study was conducted at two COVID-19-designated hospitals in Dhaka, Bangladesh, between December 2020 and October 2021. Findings: 362 participants were enrolled in the study; the median time from the onset of COVID-19 to enrolment was 57 days (IQR 41, 82). At enrolment, after adjusting for potential confounders, the HS more often had one or more symptoms, peripheral neuropathy (PN), depression and anxiety disorder, poor quality of life, dyspnea, tachycardia, restrictive lung disease on spirometry, anemia, proteinuria, and need for insulin therapy than the non-hospitalized group (95% CI > 1 for all). Although most of these findings decreased significantly over time in HS, PN increased in both groups. The incidence of diabetes was 9.8/1000 person-month, and the new requirement of insulin therapy was higher (aOR, 6.71; 95% CI, 2.87, 15.67) among HS than the NHS. Older age, being female, comorbidity, cigarette smoking, hospitalization, and contact with COVID-19 cases were independently associated with PCS. Interpretation: We observed a high burden of PCS in hospitalized and non-hospitalized survivors despite most findings' decreasing trend over time. Our results underscore the importance of continuing long-term follow-up and subsequent management. Funding: The United States Agency for International Development (USAID).