Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

19 questions · 23 findings · 2 reviews

No studies found 6 · 26.1%GRADE not reported 5 · 21.7%Very low 8 · 34.8%Low 1 · 4.3%Moderate 3 · 13%High 0 · 0%

ASA with LMWH vs placebo or IVIG

Bleeding ‐ major (bleeding requiring transfusion) Length of · people with antiphospholipid antibodies and no history of thrombosis

ASA with LMWH showed no clear difference in bleeding ‐ major (bleeding requiring transfusion) Length of compared with placebo or IVIG (moderate certainty).

1 finding from 1 review

ASA with LMWH vs placebo or IVIG

Bleeding ‐ other (bleeding during first trimester) Length of · people with antiphospholipid antibodies and no history of thrombosis

ASA with LMWH showed no clear difference in bleeding ‐ other (bleeding during first trimester) Length of compared with placebo or IVIG (moderate certainty).

1 finding from 1 review

ASA with LMWH vs placebo or IVIG

Bleeding ‐ other (postpartum haemorrhage) Length of · people with antiphospholipid antibodies and no history of thrombosis

ASA with LMWH showed no clear difference in bleeding ‐ other (postpartum haemorrhage) Length of compared with placebo or IVIG (moderate certainty).

1 finding from 1 review

ASA + high‐dose LMWH vs ASA + low‐dose LMWH or UFH

Subcutaneous bruises · people with antiphospholipid antibodies and no history of thrombosis

ASA + high‐dose LMWH showed no clear difference in subcutaneous bruises compared with ASA + low‐dose LMWH or UFH (low certainty).

1 finding from 1 review

Aspirin vs low molecular weight heparin

All‐cause mortality · ambulatory patients with multiple myeloma receiving immunomodulatory agents

It is very uncertain whether aspirin (ASA) changes all‐cause mortality compared with low molecular weight heparin (LMWH) (very low certainty).

2 findings from 1 review

Aspirin vs low molecular weight heparin

Symptomatic DVT · ambulatory patients with multiple myeloma receiving immunomodulatory agents

It is very uncertain whether aspirin (ASA) changes symptomatic deep vein thrombosis compared with low molecular weight heparin (LMWH) (very low certainty).

2 findings from 1 review

Aspirin vs low molecular weight heparin

Pulmonary embolism · ambulatory patients with multiple myeloma receiving immunomodulatory agents

It is very uncertain whether aspirin (ASA) changes pulmonary embolism compared with low molecular weight heparin (LMWH) (very low certainty).

2 findings from 1 review

Aspirin vs low molecular weight heparin

Major bleeding · ambulatory patients with multiple myeloma receiving immunomodulatory agents

It is very uncertain whether aspirin (ASA) changes major bleeding compared with low molecular weight heparin (LMWH) (very low certainty).

2 findings from 1 review