12/4 Analysis of outcomes based on serum levels
el al., Nutrition, doi:10.1016/j.nut.2020.111106 (Peer Reviewed)
Increased risk for Covid-19 in patients with Vitamin D deficiency
Increased risk for Covid-19 in patients with Vitamin D deficiency
Retrospective database analysis showing patients with vitamin D deficiency were 4.6 times more likely to be COVID-19 positive, p<0.001.
Effect extraction follows pre-specified rules prioritizing more serious outcomes. For an individual study the most serious outcome may have a smaller number of events and lower statistical signficance, however this provides the strongest evidence for the most serious outcomes when combining the results of many trials.
Katz et al., 12/4/2020, retrospective, USA, North America, peer-reviewed, 3 authors.
risk of COVID-19 case, 78.4% lower, RR 0.22, p < 0.001, adjusted per study.
Effect extraction follows pre-specified rules prioritizing more serious outcomes. For an individual study the most serious outcome may have a smaller number of events and lower statistical signficance, however this provides the strongest evidence for the most serious outcomes when combining the results of many trials.
