Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

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

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%

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

Vitamin K antagonist (VKA) prophylaxis vs no prophylaxis

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

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

1 finding from 1 review

Fondaparinux plus vitamin K antagonist vs usual care

Major bleeding · people > 18 years of age with a diagnosed deep vein thrombosis

Fondaparinux plus vitamin K antagonist showed no clear difference in major bleeding during the initial treatment compared with standard therapy (moderate certainty).

2 findings from 1 review