Retrospective study 42 patients with acute respiratory failure, 81% with low vitamin D levels.
After 10 days, patients with severe vitamin D deficiency had a 50% probability of dying, while those with vitamin D ≥ 10 ng/mL had a 5% mortality risk, RR 0.1,
p = 0.019.
Carpagnano et al., 8/9/2020, retrospective, Italy, Europe, peer-reviewed, 10 authors.
risk of death at day 26, 70.6% lower, RR 0.29, p = 0.05, treatment 5 of 34 (14.7%), control 4 of 8 (50.0%), >30 ng/mL.
risk of death at day 10, 90.0% lower, RR 0.10, p = 0.02, treatment 2 of 34 (5.9%), control 4 of 8 (50.0%), adjusted per study, >30 ng/mL.