Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

219 questions · 233 findings · 21 reviews · Headline outcomes only

No studies found 83 · 35.6%GRADE not reported 24 · 10.3%Very low 57 · 24.5%Low 50 · 21.5%Moderate 19 · 8.2%High 0 · 0%

Endovenous laser ablation (EVLA) vs foam sclerotherapy

Technical success · people with GSV incompetence

Endovenous laser ablation (EVLA) showed no clear difference in technical success (< 5 years) compared with ultrasound‐guided foam sclerotherapy (UGFS) (low certainty).

2 findings from 1 review

Alternating pressure (active) air surfaces vs foam surfaces

Proportion of participants developing a new pressure ulcer · pressure ulcer prevention

Alternating pressure (active) air surfaces showed no clear difference in proportion of participants developing a new pressure ulcer compared with foam surfaces (low certainty).

1 finding from 1 review

Alternating pressure (active) air surfaces on operating tables and subsequently on ward beds vs reactive gel surfaces on operating tables followed by foam surfaces on ward beds

Proportion of participants developing a new pressure ulcer · pressure ulcer prevention

Alternating pressure (active) air surfaces on operating tables and… may leads to lower proportion of participants developing a new pressure ulcer compared with reactive gel surfaces on operating tables followed by foam surfaces… (low certainty).

1 finding from 1 review