Factors associated with hospitalizations for Covid-19 in patients with rheumatoid arthritis: data from the Reumacov Brazil registry.

"Declarations Ethics approval and consent to participateThis study was approved by the Brazilian Committee of Ethics in Human Research on April 5, 2020, (CAAE 30186820.2.1001.8807) and registered on the Brazilian Registry of Clinical Trials (RBR-33YTQC) on June 1, 2020. All patients signed informed consent forms. Consent for publicationNot applicable. Competing interestsAPMG: Personal or institutional support: Pfizer, Abvie, Janssen. Advisory board: Pfizer. CPA: personal fees and/or non-financial support from Pfizer, AbbVie, AstraZeneca, Janssen, Bristol-Myers Squibb, Roche, Novartis and UCB. LMHM: Personal or institutional support from AbbVie, Janssen, Pfizer and Roche; delivered speeches at events related to this work and sponsored by AbbVie, Janssen, Pfizer, Roche and UCB. GR: received lecture fees from Abbvie, Janssen, Novartis, Pfizer, and UCB; advisory board from Abbvie, Janssen, and Novartis; Research support from Brazilian Society of Rheumatology, FAPEMIG and UCB; Clinical research payments from Abbvie and Pfizer; sponsorship for scientific events from Abbvie, Janssen, Lilly, Novartis, Pfizer, and UCB. SLER: speeches Abbvie e Novartis. OAM: speaker’s fees from Abbvie, Boehringer Ingelheim, GSK, Janssen, Novartis, Pfizer, UCB and Roche. GCSP: Speeches for Jansen, Novartis. ETRN: Speeches for Janssen e Apsen. MMP: Speeches for Abbvie, Novartis, Janssen, Lilly. Advisory board: Lilly, Novartis. CDLM: Personal or institutional support from Abbvie, Janssen, Novartis, Pfizer, UCB Speeches: Abbvie, Janssen, Novartis, UCB. The other authors have no conflict of interest to declare. Competing interests APMG: Personal or institutional support: Pfizer, Abvie, Janssen. Advisory board: Pfizer. CPA: personal fees and/or non-financial support from Pfizer, AbbVie, AstraZeneca, Janssen, Bristol-Myers Squibb, Roche, Novartis and UCB. LMHM: Personal or institutional support from AbbVie, Janssen, Pfizer and Roche; delivered speeches at events related to this work and sponsored by AbbVie, Janssen, Pfizer, Roche and UCB. GR: received lecture fees from Abbvie, Janssen, Novartis, Pfizer, and UCB; advisory board from Abbvie, Janssen, and Novartis; Research support from Brazilian Society of Rheumatology, FAPEMIG and UCB; Clinical research payments from Abbvie and Pfizer; sponsorship for scientific events from Abbvie, Janssen, Lilly, Novartis, Pfizer, and UCB. SLER: speeches Abbvie e Novartis. OAM: speaker’s fees from Abbvie, Boehringer Ingelheim, GSK, Janssen, Novartis, Pfizer, UCB and Roche. GCSP: Speeches for Jansen, Novartis. ETRN: Speeches for Janssen e Apsen. MMP: Speeches for Abbvie, Novartis, Janssen, Lilly. Advisory board: Lilly, Novartis. CDLM: Personal or institutional support from Abbvie, Janssen, Novartis, Pfizer, UCB Speeches: Abbvie, Janssen, Novartis, UCB. The other authors have no conflict of interest to declare."

"Funding This work has been funded by the Research Funding of the Brazilian Society of Rheumatology and CNPq (Conselho Nacional de Desenvolvimento Científico e Tecnológico –MCTIC/CNPq/FNDCT/MS/SCTIE/Decit Nº 07/2020)."

"Trial registration : Brazilian Registry of Clinical Trials - RBR-33YTQC."