Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

780 questions · 834 findings · 76 reviews

No studies found 187 · 22.4%GRADE not reported 164 · 19.7%Very low 144 · 17.3%Low 172 · 20.6%Moderate 105 · 12.6%High 62 · 7.4%

Any intermittent iron regimen (with or without other vitamins and minerals) vs daily regimen (with same vitamins and minerals)‐maternal outcomes

Maternal death · Women receiving supplements in pregnancy

Any intermittent iron regimen (with or without other vitamins and… led to lower maternal death (death while pregnant or within 42 days of… compared with daily regimen (with same vitamins and minerals)‐maternal outcomes; GRADE not reported.

1 finding from 1 review

Vitamin D plus calcium vs placebo or control

Hip Fracture · post‐menopausal women and older people at risk of osteoporotic fractures

Vitamin D [D2, D3 or 25(OH)D] plus calcium leads to lower persons sustaining new hip fracture (1 year estimate) compared with control or placebo (high certainty).

1 finding from 1 review

Vitamin D plus calcium vs placebo or control

New fractures · post‐menopausal women and older people at risk of osteoporotic fractures

Vitamin D [D2, D3 or 25(OH)D] plus calcium leads to lower persons sustaining any new fracture (1 year estimate) compared with control or placebo (high certainty).

1 finding from 1 review

Vitamin D plus calcium vs placebo

Adverse events: serum calcium above normal · relatively healthy postmenopausal women

Vitamin D plus calcium showed no clear difference in adverse events: serum calcium above normal compared with placebo (low certainty).

1 finding from 1 review

Steroid plus vitamin D vs steroids

Number of participants achieving 'response' by PGA · scalp psoriasis

Steroid plus vitamin D leads to higher number of participants achieving 'response' by PGA compared with steroid (high certainty).

1 finding from 1 review

Steroid plus vitamin D vs steroids

Number of participants achieving 'clearance' by IGA · scalp psoriasis

Steroid plus vitamin D probably leads to higher number of participants achieving 'clearance' by IGA compared with steroid (moderate certainty).

1 finding from 1 review

Steroid plus vitamin D vs steroids

Number of participants achieving 'response' by IGA · scalp psoriasis

Steroid plus vitamin D probably leads to higher number of participants achieving 'response' by IGA compared with steroid (moderate certainty).

1 finding from 1 review

Steroid plus vitamin D vs steroids

Number of participants withdrawing due to adverse events (AE) · scalp psoriasis

Steroid plus vitamin D showed no clear difference in number of participants withdrawing due to adverse events (AE) compared with steroid (moderate certainty).

1 finding from 1 review