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Vitamin D study #75 of 96
2/12 Analysis of outcomes based on serum levels
Susianti et al., Journal of Medical Biochemistry, doi:10.5937/jomb0-30228 (Peer Reviewed)
Low Levels of Vitamin D were Associated with Coagulopathy among Hospitalized Coronavirus Disease-19 (COVID-19) Patient: a Single Centered Study in Indonesia
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Retrospective 50 hospitalized PCR+ patients in Indonesia showing ICU admission, mortality, and ISTH DIC (Disseminated Intravascular Coagulation) score>=5, and increased D-dimer significantly associated with lower vitamin D levels.

Susianti et al., 2/12/2021, retrospective, Indonesia, Asia, peer-reviewed, 8 authors.
risk of death, 91.5% lower, RR 0.09, p = 0.32, high D levels 0 of 8 (0.0%), low D levels 9 of 42 (21.4%), continuity correction due to zero event (with reciprocal of the contrasting arm), >49.92 nmol/L.
risk of ICU admission, 90.5% lower, RR 0.10, p = 0.32, high D levels 0 of 8 (0.0%), low D levels 8 of 42 (19.0%), continuity correction due to zero event (with reciprocal of the contrasting arm), >49.92 nmol/L.
risk of disease progression, 81.5% lower, RR 0.19, p = 0.04, high D levels 8, low D levels 42, ISTH DIC>=5, >49.92 nmol/L, bivariate.
risk of disease progression, 44.4% lower, RR 0.56, p = 0.03, high D levels 8, low D levels 42, increased D-dimer >2 mg/L, >49.92 nmol/L, multivariate.

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.
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