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What do systematic reviews say?

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Evidence found and GRADE certainty

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

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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%

Effects of extensive instructions vs simple instructions

PAR pass rate (%) ‐ Fit testing of foam earplugs (immediate) · workers exposed to noise using HPDs

Effects of extensive instructions probably leads to higher PAR pass rate (%) ‐ Fit testing of foam earplugs (immediate) compared with simple instructions (moderate certainty).

1 finding from 1 review

Other dressing vs control

Proportion of participants developing a new pressure ulcer · individuals at risk of pressure ulcer development

Other dressing showed no clear difference in pressure ulcer incidence: thin polyurethane foam vs no dressing compared with control (low certainty).

2 findings from 1 review

Intervention not reported

Foam versus nonadherent dressing · people with venous leg ulcers

The intervention showed no clear difference in foam versus nonadherent dressing (low certainty).

1 finding from 1 review

Intervention not reported

Sucralfate versus foam · people with venous leg ulcers

The intervention may leads to higher sucralfate versus foam (low certainty).

1 finding from 1 review

Intervention not reported

Silver versus foam · people with venous leg ulcers

The intervention may leads to higher silver versus foam (low certainty).

1 finding from 1 review

Intervention not reported

Foam versus hydrocolloid · people with venous leg ulcers

It is very uncertain whether the intervention changes foam versus hydrocolloid (very low certainty).

1 finding from 1 review

NMA evidence for individual network: proportion with complete healing ‐ interventions vs saline gauze

Combination silicone foam dressings · people with pressure ulcers

It is very uncertain whether NMA evidence for individual network: proportion with complete… changes combination silicone foam dressings compared with saline gauze (very low certainty).

1 finding from 1 review

Reactive fibre surfaces vs foam surfaces

Proportion of participants developing a new pressure ulcer · preventing pressure ulcers

It is very uncertain whether reactive fibre surfaces changes proportion of participants developing a new pressure ulcer compared with foam surfaces (very low certainty).

1 finding from 1 review