Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

228 questions · 230 findings · 22 reviews · Headline outcomes only

No studies found 34 · 14.8%GRADE not reported 1 · 0.4%Very low 46 · 20%Low 69 · 30%Moderate 69 · 30%High 11 · 4.8%

Intervention not reported

Progression‐free survival · people with metastatic colorectal cancer ‐ extended RAS MT

The intervention showed no clear difference in progression‐free survival (moderate certainty).

1 finding from 1 review

Chemotherapy plus involved‐field radiation vs same chemotherapy plus extended‐field radiation

Secondary malignant neoplasms · Patients with untreated Hodgkin lymphoma (early stages)

Chemotherapy plus involved‐field radiation showed no clear difference in secondary malignant neoplasms compared with same chemotherapy plus extended‐field radiation (low certainty).

1 finding from 1 review

Chemotherapy plus involved‐field radiation vs same chemotherapy plus extended‐field radiation

Death · Patients with untreated Hodgkin lymphoma (early stages)

Chemotherapy plus involved‐field radiation showed no clear difference in death compared with same chemotherapy plus extended‐field radiation (high certainty).

1 finding from 1 review

Chemotherapy plus involved‐field radiation vs same chemotherapy plus extended‐field radiation

Progression/relapse · Patients with untreated Hodgkin lymphoma (early stages)

Chemotherapy plus involved‐field radiation showed no clear difference in progression/relapse compared with same chemotherapy plus extended‐field radiation (high certainty).

1 finding from 1 review

Heparin vs placebo

Symptomatic VTE · people requiring prevention of venous thromboembolism following total hip or knee replacement or hip fracture repair

Heparin showed no clear difference in symptomatic VTE (DVT and PE) Treatment duration 28 ‐ 42 days compared with placebo (high certainty).

1 finding from 1 review

Vitamin K antagonists vs placebo

Major bleeding · people requiring prevention of venous thromboembolism following total hip or knee replacement or hip fracture repair

Vitamin K antagonists showed no clear difference in bleeding ‐ major Treatment duration 28 ‐ 42 days compared with placebo (low certainty).

1 finding from 1 review

Vitamin K antagonists vs placebo

Clinically relevant non‐major bleeding Treatment duration 28 ‐ 42 days · people requiring prevention of venous thromboembolism following total hip or knee replacement or hip fracture repair

The review found no eligible studies for this question.

1 finding from 1 review

DOAC vs placebo

Symptomatic VTE · people requiring prevention of venous thromboembolism following total hip or knee replacement or hip fracture repair

DOAC probably leads to lower symptomatic VTE (DVT and PE) Treatment duration 28 ‐ 42 days compared with placebo (moderate certainty).

1 finding from 1 review

DOAC vs placebo

Symptomatic DVT · people requiring prevention of venous thromboembolism following total hip or knee replacement or hip fracture repair

DOAC leads to lower symptomatic DVT (proximal or distal) Treatment duration 28 ‐ 42 days compared with placebo (high certainty).

1 finding from 1 review

DOAC vs placebo

Symptomatic PE Treatment duration 28 ‐ 42 days · people requiring prevention of venous thromboembolism following total hip or knee replacement or hip fracture repair

DOAC showed no clear difference in symptomatic PE Treatment duration 28 ‐ 42 days compared with placebo (low certainty).

1 finding from 1 review

DOAC vs placebo

Major bleeding · people requiring prevention of venous thromboembolism following total hip or knee replacement or hip fracture repair

DOAC showed no clear difference in bleeding ‐ major Treatment duration 28 ‐ 42 days compared with placebo (low certainty).

1 finding from 1 review