Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

100 questions · 100 findings · 15 reviews · Vascular

No studies found 32 · 32%GRADE not reported 4 · 4%Very low 13 · 13%Low 35 · 35%Moderate 15 · 15%High 1 · 1%

Low molecular weight heparin vs vitamin K antagonist (VKA)

Recurrent VTE · patients with symptomatic VTE requiring long term treatment (3 months) for symptomatic VTE

LMWH showed no clear difference in incidence of recurrent VTE (treatment duration 3 months) compared with VKA (moderate certainty).

1 finding from 1 review

Low molecular weight heparin vs vitamin K antagonist (VKA)

Major bleeding · patients with symptomatic VTE requiring long term treatment (3 months) for symptomatic VTE

LMWH may leads to lower incidence of major bleeding (treatment duration 3 months) compared with VKA (low certainty).

1 finding from 1 review

Low molecular weight heparin vs vitamin K antagonist (VKA)

Mortality (treatment duration 3 months) · patients with symptomatic VTE requiring long term treatment (3 months) for symptomatic VTE

LMWH showed no clear difference in mortality (treatment duration 3 months) compared with VKA (moderate certainty).

1 finding from 1 review

Duplex ultrasound plus pulse palpation and arterial pressure index (ABI or TBI) vs pulse palpation plus arterial pressure index (ABI or TBI) (long term)

Secondary patency (24 months) · people who underwent a lower limb revascularisation

Duplex ultrasound plus pulse palpation and arterial pressure index… showed no clear difference in vessel or graft secondary patency compared with pulse palpation plus arterial pressure index (ABI or TBI) (long term) (low certainty).

1 finding from 1 review

[Radial] Oblique‐axis in‐plane B‐mode ultrasound vs long‐axis in‐plane B‐mode ultrasound

First‐attempt success rate · adults requiring radial artery catheterisation

It is very uncertain whether [Radial] Oblique‐axis in‐plane B‐mode ultrasound changes first‐attempt success rate compared with long‐axis in‐plane B‐mode ultrasound (very low certainty).

1 finding from 1 review