Melatonin does not reduce mortality in adult hospitalized patients with COVID-19: a multicenter retrospective observational study
MPH Marina Sánchez-Rico, MPH Pedro De La Muela, MPH Juan J Herrera-Morueco, MD Pierre A Geoffroy, MD Frédéric Limosin, MD Nicolas Hoertel
Journal of Travel Medicine, doi:10.1093/jtm/taab195
Melatonin is an hormone secreted from the pineal gland indicated in the treatment of insomnia and circadian sleep disturbances. 1 In the needed search for an effective treatment for patients with COVID-19, 2 this molecule has been previously proposed as a potential useful treatment against COVID-19 thanks to its antioxidant, immunomodulatory, anti-inflammatory and potential SARS-CoV-2 main protease inhibition activities. [3] [4] [5] [6] However, while a recent randomized clinical trial 7 involving patients hospitalized with mild to moderate COVID-19 suggests that oral melatonin administration as an adjuvant therapy added to the standard of care may improve respiratory symptoms and time of patient discharge vs standard of care alone, another randomized trial found no substantial improvement in patients hospitalized for severe In this report, we used data from a multicenter retrospective study involving patients hospitalized for laboratory-confirmed COVID-19 in Greater Paris University hospitals, as detailed elsewhere, 9 and sought to examine the association between melatonin use and mortality in this population. Observational studies examining the potential usefulness of existing treatments against COVID-19 can be crucial to help prioritize molecules in clinical trials.
Supplementary data Supplementary data are available at JTM online.
Author contributions M.S.R. contributed to the study design, performed statistical analyses and wrote the first draft of the manuscript. P.d.l.M. and J.J.H.M. performed statistical analyses and contributed to the writing of the manuscript. N.H. designed the study and critically revised the manuscript. F.L. and P.A.G. contributed to study design and critically revised the manuscript for scientific content.
Conflict of interest None declared.
Ethical statement This observational study using routinely collected data received approval from the Institutional Review Board of the AP-HP Clinical Data Warehouse (decision CSE-20-20_COVID19, IRB00011591, 8 April 2020). AP-HP Clinical Data Warehouse initiatives ensure patient information and informed consent regarding the different approved studies through a transparency portal in accordance with European Regulation on data protection and authorization n • 1 980 120 from National Commission for Information Technology and Civil Liberties (CNIL).
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