Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

1,126 questions · 1,225 findings · 111 reviews

No studies found 235 · 19.2%GRADE not reported 260 · 21.2%Very low 207 · 16.9%Low 271 · 22.1%Moderate 177 · 14.4%High 75 · 6.1%

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

Vitamin A deficiency · 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… showed no clear difference in vitamin A deficiency (as defined by the study authors) compared with unfortified rice (no micronutrients added) (low certainty).

1 finding from 1 review

Antioxidants vs placebo

Cognitive function · cognitively healthy people in mid and late life
6 findings from 1 review
Show 3 more findings

Pyridoxal 5 phosphate (vitamin B6) vs placebo

Clinical efficacy ‐ improvement (> 40%) in ESRS scores from baseline ESRS1 · patients with antipsychotic‐induced tardive dyskinesia

Pyridoxal 5 phosphate (vitamin B6) may leads to higher clinical efficacy ‐ improvement (> 40%) in ESRS scores from baseline… compared with placebo (low certainty).

1 finding from 1 review

Pyridoxal 5 phosphate (vitamin B6) vs placebo

Global: Other adverse effects than tardive dyskinesia Self‐report by participants · patients with antipsychotic‐induced tardive dyskinesia

Pyridoxal 5 phosphate (vitamin B6) showed no clear difference in global: Other adverse effects than tardive dyskinesia Self‐report by… compared with placebo (low certainty).

1 finding from 1 review

Pyridoxal 5 phosphate (vitamin B6) vs placebo

Tardive dyskinesia: Deterioration of symptoms · patients with antipsychotic‐induced tardive dyskinesia

Pyridoxal 5 phosphate (vitamin B6) showed no clear difference in tardive dyskinesia: Deterioration in tardive dyskinesia symptoms ESRS1 compared with placebo (low certainty).

1 finding from 1 review

Vitamin K antagonist (VKA) prophylaxis vs no prophylaxis

Mortality at 6 months: main analysis · ambulatory people with cancer without venous thromboembolism receiving systemic therapy

Vitamin K antagonist (VKA) prophylaxis showed no clear difference in mortality at 6 months: main analysis compared with no prophylaxis (moderate certainty).

1 finding from 1 review

Vitamin K antagonist (VKA) prophylaxis vs no prophylaxis

All‐cause mortality · ambulatory people with cancer without venous thromboembolism receiving systemic therapy

Vitamin K antagonist (VKA) prophylaxis showed no clear difference in mortality compared with no prophylaxis (moderate certainty).

1 finding from 1 review