Evidence Gaps

What do systematic reviews say?

1 questions · 2 findings · 1 reviews

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No studies found 0 · 0%GRADE not reported 2 · 100%Very low 0 · 0%Low 0 · 0%Moderate 0 · 0%High 0 · 0%

Vitamin D vs placebo or control

Mortality (all cause) · Adults (general population)

Meta-analysis of randomised trials of vitamin D supplementation for Mortality (all cause) (Vitamin D2, general population): RR 1.04 (95% CI 0.97 to 1.11), not statistically significant. Umbrella review outcome-level evidence grade: No conclusion.

2 findings from 1 review

Vitamin D and multiple health outcomes: umbrella review of systematic reviews and meta-analyses of observational… 2014 All outcomes
Vitamin D2, general population
RR 1.04 [0.97, 1.11]
8 studies · 17079 participants
GRADE not reported
Vitamin D and multiple health outcomes: umbrella review of systematic reviews and meta-analyses of observational… 2014 All outcomes
Vitamin D3, general population
RR 0.91 [0.82, 1.02]
9 studies · 12824 participants
GRADE not reported