Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

339 questions · 346 findings · 42 reviews · Headline outcomes only

No studies found 74 · 21.4%GRADE not reported 8 · 2.3%Very low 72 · 20.8%Low 107 · 30.9%Moderate 68 · 19.7%High 17 · 4.9%

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 given to lactating mothers vs placebo or no treatment

Nutritional rickets ‐ biochemical Alkaline phosphatase, calcium and phosphate levels. · term breastfed infants to prevent vitamin D deficiency and improve bone health

Vitamin D given to lactating mothers may leads to lower nutritional rickets ‐ biochemical Alkaline phosphatase, calcium and… compared with placebo or no treatment (low certainty).

1 finding from 1 review

Total thyroidectomy vs subtotal thyroidectomy

Permanent hypocalcaemia/hypoparathyroidism [measured by serum calcium levels]

Total thyroidectomy showed no clear difference in permanent hypocalcaemia/hypoparathyroidism [measured by serum… compared with bilateral subtotal thyroidectomy (low certainty).

2 findings from 1 review