Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

215 questions · 236 findings · 28 reviews · Headline outcomes only

No studies found 45 · 19.1%GRADE not reported 15 · 6.4%Very low 78 · 33.1%Low 50 · 21.2%Moderate 34 · 14.4%High 14 · 5.9%

Laser therapy vs other treatments

Incidence and severity of treatment‐related adverse effects ‐ 585‐nm PDL versus silicone gel sheeting ‐ pain during laser treatments ‐ hypertrophic scars ‐ · participants with hypertrophic and keloid scars

It is very uncertain whether laser therapy changes incidence and severity of treatment‐related adverse effects ‐ 585‐nm… compared with other treatments (very low certainty).

1 finding from 1 review

Summary of findings table ‐ Other therapies (cryotherapy) vs other therapies (fractional CO2 laser)

Short‐term hair regrowth ≥ 75% (between 12 and 26 weeks of · adults with alopecia areata

It is very uncertain whether summary of findings table ‐ Other therapies (cryotherapy) changes short‐term hair regrowth ≥ 75% compared with other therapies (fractional CO2 laser) (very low certainty).

1 finding from 1 review