Cozier, 1,974 patient vitamin D sufficiency study: 39% fewer cases [p=0.04] https://c19p.org/cozier
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Lower serum 25(OH)D levels associated with higher risk of COVID-19 infection in U.S. Black women
et al., PLoS ONE, doi:10.1371/journal.pone.0255132
Prospective study of vitamin D levels and COVID-19 infection in the Black Women's Health Study, showing higher risk of infection for lower vitamin D levels. Vitamin D levels were from 3-7 years before infection. Levels at the time of infection may differ, which may reduce the size of the effect observed.
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risk of case, 38.6% lower, RR 0.61, p = 0.04, high D levels 94 of 1,601 (5.9%), low D levels 33 of 373 (8.8%), NNT 34, adjusted per study, inverted to make RR<1 favor high D levels, odds ratio converted to relative risk, >20ng/mL, multivariable.
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| Effect extraction follows pre-specified rules prioritizing more serious outcomes. Submit updates |
Cozier et al., 27 Jul 2021, prospective, USA, peer-reviewed, 6 authors.
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