Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

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

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‐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 radiofrequency (very low certainty).

1 finding from 1 review

Fractional laser vs radiofrequency

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

The review found no eligible studies for this question.

1 finding from 1 review

Metronidazole vs placebo

HRQOL ‐ not measured · Participants with rosacea

The review found no eligible studies for this question.

1 finding from 1 review

Azelaic acid vs placebo

Participant‐assessed improvement in rosacea severity · Participants with rosacea

Azelaic acid leads to higher participant‐assessed improvement in rosacea severity Marked… compared with placebo (high certainty).

1 finding from 1 review

Doxycycline 40 mg + azelaic acid gel vs doxycycline 40 mg + metronidazole gel

Physician‐assessed improvement in rosacea severity · Participants with rosacea

Doxycycline 40 mg + azelaic acid gel showed no clear difference in physician‐assessed improvement in rosacea severity Investigator's… compared with doxycycline 40 mg + metronidazole gel (high certainty).

1 finding from 1 review

Minocycline 45 mg vs minocycline 45 mg + azelaic acid gel

Proportion of participants with adverse event · Participants with rosacea

Minocycline 45 mg showed no clear difference in proportion of participants with adverse event compared with minocycline 45 mg + azelaic acid gel (low certainty).

1 finding from 1 review

Azelaic acid vs placebo

Proportion of participants with adverse event · Participants with rosacea
1 finding from 1 review