Randomized but unblinded experiment on vitamin D as a coronavirus treatment. Let’s talk about what comes next. (Hint: it involves multilevel models.) — Andrew Gelman

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Of interest statistically.Statistical Modeling, Causal Inference, and Social ScienceRandomized but unblinded experiment on vitamin D as a coronavirus treatment. Let’s talk about what comes next. (Hint: it involves multilevel models.) Andrew Gelman | Professor of Statistics and Political Science and Director of the Applied Statistics Center, Columbia UniversityAnother studyPLOSVitamin D sufficiency, a serum 25-hydroxyvitamin D at least 30 ng/mL reduced risk for adverse clinical outcomes in patients with COVID-19 infection Zhila Maghbooli,Mohammad Ali Sahraian ,Mehdi Ebrahimi,Marzieh Pazoki,Samira Kafan,Hedieh Moradi Tabriz,Azar Hadadi,Mahnaz Montazeri,Mehrad Nasiri,Arash Shirvani,Michael F. Holick

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