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What do systematic reviews say?

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Evidence found and GRADE certainty

948 questions · 998 findings · 100 reviews · Headline outcomes only

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No studies found 233 · 23.3%GRADE not reported 40 · 4%Very low 203 · 20.3%Low 271 · 27.2%Moderate 176 · 17.6%High 75 · 7.5%

Intervention not reported

Adverse events · people with cystic fibrosis

The review found no eligible studies for this question.

1 finding from 1 review

Intervention not reported

PIVKA II levels: change in PIVKA II (ng/mL) · people with cystic fibrosis

The review found no eligible studies for this question.

1 finding from 1 review

Intervention not reported

Uncarboxylated osteocalcin: change in carboxylation of osteocalcin level (% Glu‐OC) · people with cystic fibrosis
1 finding from 1 review

Intervention not reported

Time to cessation of bleeding · people with cystic fibrosis

The review found no eligible studies for this question.

1 finding from 1 review

Intervention not reported

Bone mineral density: lumbar spine z score · people with cystic fibrosis

The review found no eligible studies for this question.

1 finding from 1 review

Rice fortified with iron alone or in combination with other micronutrients vs unfortified rice (no micronutrients added)

Anaemia · general population of all age groups (including pregnant women) from any country, over two years of age

Rice fortified with iron alone or in combination with other… may leads to lower anaemia (defined as haemoglobin below the WHO cut‐off, adjusted for… compared with unfortified rice (no micronutrients added) (low certainty).

1 finding from 1 review

Rice fortified with iron alone or in combination with other micronutrients vs unfortified rice (no micronutrients added)

Iron deficiency (as defined by study authors, based on a biomarker of iron status) · general population of all age groups (including pregnant women) from any country, over two years of age

Rice fortified with iron alone or in combination with other… may leads to lower iron deficiency (as defined by study authors, based on a biomarker… compared with unfortified rice (no micronutrients added) (low certainty).

1 finding from 1 review

Rice fortified with iron alone or in combination with other micronutrients vs unfortified rice (no micronutrients added)

Any adverse effects (hookworm infection risk) · general population of all age groups (including pregnant women) from any country, over two years of age

Rice fortified with iron alone or in combination with other… may leads to higher any adverse effects (hookworm infection risk) compared with unfortified rice (no micronutrients added) (low certainty).

1 finding from 1 review

Rice fortified with iron alone or in combination with other micronutrients vs unfortified rice (no micronutrients added)

Diarrhoea · general population of all age groups (including pregnant women) from any country, over two years of age

It is very uncertain whether rice fortified with iron alone or in combination with other… changes diarrhoea (as defined by study authors) compared with unfortified rice (no micronutrients added) (very low certainty).

1 finding from 1 review