Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

973 questions · 1,024 findings · 106 reviews

No studies found 235 · 22.9%GRADE not reported 59 · 5.8%Very low 207 · 20.2%Low 271 · 26.5%Moderate 177 · 17.3%High 75 · 7.3%

Intervention not reported

Cancer mortality in trials using vitamin D3 (cholecalciferol) ( · adults

The intervention probably leads to lower cancer mortality in trials using vitamin D3 (cholecalciferol) ( (moderate certainty).

1 finding from 1 review

Intervention not reported

Adverse events: nephrolithiasis in trials using vitamin D3 combined with calcium ( · adults

The intervention probably leads to higher adverse events: nephrolithiasis in trials using vitamin D3 combined… (moderate certainty).

1 finding from 1 review

Intervention not reported

Adverse events: hypercalcaemia in trials using the active forms of vitamin D (alfacalcidol and calcitriol) ( · adults

The intervention may leads to higher adverse events: hypercalcaemia in trials using the active forms of… (low certainty).

1 finding from 1 review

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

Vitamin K antagonist (VKA) prophylaxis vs no prophylaxis

Pulmonary embolism · ambulatory people with cancer without venous thromboembolism receiving systemic therapy

It is very uncertain whether vitamin K antagonist (VKA) prophylaxis changes pulmonary embolism compared with no prophylaxis (very low certainty).

1 finding from 1 review

Vitamin K antagonist (VKA) prophylaxis vs no prophylaxis

Symptomatic DVT · ambulatory people with cancer without venous thromboembolism receiving systemic therapy

It is very uncertain whether vitamin K antagonist (VKA) prophylaxis changes symptomatic deep vein thrombosis compared with no prophylaxis (very low certainty).

1 finding from 1 review

Vitamin K antagonist (VKA) prophylaxis vs no prophylaxis

Major bleeding · ambulatory people with cancer without venous thromboembolism receiving systemic therapy

Vitamin K antagonist (VKA) prophylaxis probably leads to higher major bleeding compared with no prophylaxis (moderate certainty).

1 finding from 1 review