Retrospective 25 ICU patients in Brazil, showing vitamin D deficiency associated with higher neutrophil-lymphocyte ratio. There appears to be a typo in the mortality percentage for vitamin D deficiency (20% is not valid for the group size of 8).
Pimental et al., 5/31/2021, retrospective, Brazil, South America, peer-reviewed, 3 authors.
risk of death, 29.4% lower, RR 0.71, p = 1.00, high D levels 3 of 17 (17.6%), low D levels 2 of 8 (25.0%), >20ng/mL.
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.