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Evidence found and GRADE certainty

1,057 questions · 1,077 findings · 32 reviews · Skin

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No studies found 395 · 36.7%GRADE not reported 89 · 8.3%Very low 172 · 16%Low 177 · 16.4%Moderate 191 · 17.7%High 53 · 4.9%

Fractional laser vs radiofrequency

Participant‐assessed adverse events (short‐term) · people with acne scars

The review found no eligible studies for this question.

1 finding from 1 review

Fractional laser vs combined chemical peeling plus needling

Participant‐reported scar improvement (long‐term) · people with acne scars

It is very uncertain whether fractional laser changes participant‐reported scar improvement (long‐term) N of participants… compared with combined chemical peeling plus needling (very low certainty).

1 finding from 1 review

Fractional laser vs combined chemical peeling plus needling

Participant‐assessed adverse events (short‐term) N of participants with adverse events · people with acne scars

It is very uncertain whether fractional laser changes participant‐assessed adverse events (short‐term) N of participants… compared with combined chemical peeling plus needling (very low certainty).

1 finding from 1 review

Fractional laser vs non‐fractional non‐ablative laser

Participant‐reported scar improvement (short‐term) N of participants with > 50% improvement in acne scars · people with acne scars

It is very uncertain whether fractional laser changes participant‐reported scar improvement (short‐term) N of participants… compared with non‐fractional non‐ablative laser (very low certainty).

1 finding from 1 review

Chemical peeling vs placebo or no treatment

Serious or severe adverse events N of participants with positive severe adverse events · people with acne scars

It is very uncertain whether chemical peeling changes serious or severe adverse events N of participants with positive… compared with placebo or no treatment (very low certainty).

1 finding from 1 review

Chemical peeling vs combined chemical peeling plus any active intervention

Participant‐reported scar improvement (long‐term) · people with acne scars

It is very uncertain whether chemical peeling changes participant‐reported scar improvement (long‐term) N of participants… compared with combined chemical peeling plus any active intervention (very low certainty).

1 finding from 1 review