Findings

What do systematic reviews say?

4 questions · 4 findings · 3 reviews · Vascular

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No studies found 1 · 25%GRADE not reported 0 · 0%Very low 0 · 0%Low 2 · 50%Moderate 1 · 25%High 0 · 0%

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

Subcutaneous unfractionated heparin for the initial treatment of venous thromboembolism 2017 · Cochrane Headline outcomes only
OR 0.91 [0.42, 1.97]
4 studies · 583 participants
Low

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 for the initial treatment of venous thromboembolism 2017 · Cochrane Headline outcomes only
OR 0.72 [0.43, 1.2]
5 studies · 2300 participants
Low

Unfractionated heparin vs no thromboprophylaxis

Major bleeding · ambulatory cancer patients receiving chemotherapy

The review found no eligible studies for this question.

1 finding from 1 review

Primary prophylaxis for venous thromboembolism in ambulatory cancer patients receiving chemotherapy 2020 · Cochrane Headline outcomes only
no estimate extracted
Studies not reported
No studies found

Intervention not reported

Major bleeding events (timing not specified) · children with congenital heart disease undergoing CC

The intervention showed no clear difference in major bleeding events (timing not specified) (moderate certainty).

1 finding from 1 review

Different unfractionated heparin doses for preventing arterial thrombosis in children undergoing cardiac catheterization 2020 · Cochrane Headline outcomes only
RR 2.96 [0.12, 71.34]
1 study · 137 participants
Moderate