COVID-19 studies:  C19 studies: C19:  IvermectinIVM Vitamin DV.D HC QHC Q Vitamin CV.C ZincZn PXPX BHBH FPVFPV FLVFLV PVP-IPI CICI BLBL RDRD
Vitamin D study #80 of 89
3/8 Analysis of outcomes based on serum levels
Charoenngam et al., Endocrine Practice, doi:10.1016/j.eprac.2021.02.013 (Peer Reviewed)
Association of vitamin D status with hospital morbidity and mortality in adult hospitalized COVID-19 patients
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Retrospective 287 hospitalized patients in the USA showing significantly lower mortality with vitamin D sufficiency in elderly patients and patients without obesity; and lower mortality for all patients but not reaching statistical signifance.

Charoenngam et al., 3/8/2021, retrospective, USA, North America, peer-reviewed, 6 authors.
risk of death, 34.1% lower, RR 0.66, p = 0.19, high D levels 12 of 100 (12.0%), low D levels 29 of 187 (15.5%), adjusted per study, odds ratio converted to relative risk, >=30ng/mL.
risk of mechanical ventilation, 37.2% lower, RR 0.63, p = 0.11, high D levels 14 of 100 (14.0%), low D levels 34 of 187 (18.2%), adjusted per study, odds ratio converted to relative risk, >=30ng/mL.
risk of ICU admission, 23.1% lower, RR 0.77, p = 0.14, high D levels 25 of 100 (25.0%), low D levels 56 of 187 (29.9%), adjusted per study, odds ratio converted to relative risk, >=30ng/mL.
risk of death, 58.1% lower, RR 0.42, p = 0.01, high D levels 7 of 57 (12.3%), low D levels 25 of 79 (31.6%), adjusted per study, odds ratio converted to relative risk, >65 years old, >=30ng/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.
Details of all 89 studies
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