Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

1,501 questions · 1,558 findings · 115 reviews · Vascular

No studies found 346 · 22.2%GRADE not reported 90 · 5.8%Very low 281 · 18%Low 477 · 30.6%Moderate 313 · 20.1%High 51 · 3.3%

Emergency endovascular aneurysm repair vs conventional open repair

Complication: renal complications (moderate or severe) (30‐day) · people diagnosed with RAAA

Emergency endovascular aneurysm repair showed no clear difference in complication: renal complications (moderate or severe) (30‐day) compared with conventional open repair (low certainty).

1 finding from 1 review

Low molecular weight heparin vs placebo or no prophylaxis

Deep vein thrombosis · prevention of venous thromboembolism in patients with lower‐limb immobilization

Low molecular weight heparin probably leads to lower deep venous thrombosis compared with no prophylaxis or placebo (moderate certainty).

1 finding from 1 review

Low molecular weight heparin vs placebo or no prophylaxis

Pulmonary embolism · prevention of venous thromboembolism in patients with lower‐limb immobilization

Low molecular weight heparin showed no clear difference in pulmonary embolism compared with no prophylaxis or placebo (low certainty).

1 finding from 1 review

Low molecular weight heparin vs placebo or no prophylaxis

Symptomatic venous thromboembolism · prevention of venous thromboembolism in patients with lower‐limb immobilization

Low molecular weight heparin may leads to lower symptomatic venous thromboembolism compared with no prophylaxis or placebo (low certainty).

1 finding from 1 review

Low molecular weight heparin vs placebo or no prophylaxis

Mortality due to other causes · prevention of venous thromboembolism in patients with lower‐limb immobilization

Low molecular weight heparin showed no clear difference in mortality due to other causes compared with no prophylaxis or placebo (low certainty).

1 finding from 1 review

Low molecular weight heparin vs placebo or no prophylaxis

Adverse outcomes · prevention of venous thromboembolism in patients with lower‐limb immobilization

Low molecular weight heparin showed no clear difference in adverse outcomes compared with no prophylaxis or placebo (low certainty).

1 finding from 1 review

Subcutaneous unfractionated heparin vs unfractionated heparin

Symptomatic recurrent VTE at 3 months · people aged ≥ 18 years with a diagnosis of new or recurrent VTE

Subcutaneous unfractionated heparin showed no clear difference in symptomatic recurrent VTE at 3 months compared with intravenous unfractionated heparin (low certainty).

1 finding from 1 review

Subcutaneous unfractionated heparin vs low molecular weight heparin

VTE‐related mortality4 · people aged ≥ 18 years with a diagnosis of new or recurrent VTE

Subcutaneous unfractionated heparin showed no clear difference in VTE‐related mortality at 3 months compared with low molecular weight heparin (low certainty).

1 finding from 1 review

Subcutaneous unfractionated heparin vs low molecular weight heparin

Major bleedingd (3 months) · people aged ≥ 18 years with a diagnosis of new or recurrent VTE

Subcutaneous unfractionated heparin showed no clear difference in major bleedingd (3 months) compared with low molecular weight heparin (low certainty).

1 finding from 1 review

Subcutaneous unfractionated heparin vs low molecular weight heparin

All‐cause mortality (7 days ‐ 3 months) · people aged ≥ 18 years with a diagnosis of new or recurrent VTE

Subcutaneous unfractionated heparin showed no clear difference in all‐cause mortality (7 days ‐ 3 months) compared with low molecular weight heparin (low certainty).

1 finding from 1 review

Subcutaneous unfractionated heparin vs unfractionated heparin

Symptomatic recurrent DVT at 3 months · people aged ≥ 18 years with a diagnosis of new or recurrent VTE

Subcutaneous unfractionated heparin showed no clear difference in symptomatic recurrent DVT at 3 months compared with intravenous unfractionated heparin (low certainty).

1 finding from 1 review

Subcutaneous unfractionated heparin vs unfractionated heparin

VTE‐related mortality4 · people aged ≥ 18 years with a diagnosis of new or recurrent VTE

Subcutaneous unfractionated heparin showed no clear difference in VTE‐related mortality at 3 months compared with intravenous unfractionated heparin (low certainty).

1 finding from 1 review

Subcutaneous unfractionated heparin vs unfractionated heparin

Major bleedingd (3 months) · people aged ≥ 18 years with a diagnosis of new or recurrent VTE

Subcutaneous unfractionated heparin showed no clear difference in major bleedingd (7 days ‐ 12 months) compared with intravenous unfractionated heparin (low certainty).

1 finding from 1 review