TY - JOUR T1 - Aetiological and prognostic roles of frailty, multimorbidity and socioeconomic characteristics in the development of SARS-CoV-2 health outcomes: protocol for systematic reviews of population-based studies JF - BMJ Open Y1 - 2022 A1 - Tatjana T Makovski A1 - Jinane Ghattas A1 - Stephanie Monnier Besnard A1 - Monika Ambrozova A1 - Barbora Vasinova A1 - Rodrigo Feteira-Santos A1 - Peter Bezzegh A1 - Felipe Ponce Bollmann A1 - James Cottam A1 - Romana Haneef A1 - Brecht Devleesschauwer A1 - Niko Speybroeck A1 - Paulo Nogueira A1 - Maria João Forjaz A1 - Joel Coste A1 - Laure Carcaillon-Bentata KW - COVID-19 KW - epidemiology KW - public health. AB -

Introduction: There is growing evidence that the impact of COVID-19 crisis may be stronger for individuals with multimorbidity, frailty and lower socioeconomic status. Existing reviews focus on few, mainly short-term effects of COVID-19 illness and patients with single chronic disease. Information is also largely missing for population representative samples.Applying population-based approach, the systematic reviews will have two objectives: (1) to evaluate the aetiological roles of frailty, multimorbidity and socioeconomic status on SARS-CoV-2 infection probability, hospitalisation, intensive care unit (ICU) admission, mechanical ventilation and COVID-19 related mortality among general population and (2) to investigate the prognostic roles of frailty, multimorbidity and socioeconomic characteristics on the risk of hospitalisation, ICU admission, mechanical ventilation, COVID-19 mortality, functioning, quality of life, disability, mental health and work absence.

Methods and analysis: For this ongoing work, four databases were searched: PubMed, Embase, WHO COVID-19 Global literature on coronavirus disease and PsycINFO, for the period between January 2020 and April 7 2021. Peer-reviewed published literature in English and all types of population-based studies will be considered. Studies using standard tools to assess multimorbidity such as disease count, comorbidity indices or disease combinations will be retained, as well as studies with standard scales and scores for frailty or measurement of a socioeconomic gradient. Initial search included 10 139 articles, 411 for full-text reading. Results will be summarised by risk factor, objective and outcome. The feasibility of meta-analysis will be determined by the findings and will aim to better understand uncertainties of the results. Quality of studies will be assessed using standardised scales.

Ethics and dissemination: The study will be based on published evidence, and it is exempt from the ethical approval. This work is part of the Population Health Information Research Infrastructure (PHIRI) project. Dissemination of the results will imply conference presentation, submission for scientific publication and PHIRI project report.

VL - 12 CP - 11 M3 - 10.1136/bmjopen-2022-063573 ER -