Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

628 questions · 651 findings · 39 reviews · Skin

No studies found 167 · 25.7%GRADE not reported 47 · 7.2%Very low 80 · 12.3%Low 139 · 21.4%Moderate 174 · 26.7%High 44 · 6.8%

Oral retinoids: alitretinoin 30 mg vs placebo

Secondary: investigator‐rated reduction in severity in TLSSc and mTLSSd · people with moderate to severe chronic hand eczema

The review found no eligible studies for this question.

1 finding from 1 review

Oral retinoids: alitretinoin 10 mg vs placebo

Primary: investigator‐rated good/excellent control of symptoms · people with moderate to severe chronic hand eczema

Oral retinoids: alitretinoin 10 mg leads to higher primary: investigator‐rated good/excellent control of symptoms compared with placebo (high certainty).

1 finding from 1 review

Oral retinoids: alitretinoin 10 mg vs placebo

Primary: participant‐rated good/excellent control of symptoms · people with moderate to severe chronic hand eczema

Oral retinoids: alitretinoin 10 mg leads to higher primary: participant‐rated good/excellent control of symptoms compared with placebo (high certainty).

1 finding from 1 review

Oral retinoids: alitretinoin 10 mg vs placebo

Primary outcome 3: Adverse events · people with moderate to severe chronic hand eczema

Oral retinoids: alitretinoin 10 mg showed no clear difference in primary: all adverse events compared with placebo (moderate certainty).

1 finding from 1 review

Oral methotrexate and oral prednisone vs prednisone or placebo

Primary outcome: Global improvement of disease activity or damage assessed by a medical practitioner or by participants · children and adolescents with active morphea (linear scleroderma, generalised morphea and mixed subtype: linear and circumscribed).

Oral methotrexate and oral prednisone may leads to higher primary outcome: Global improvement of disease activity or damage… compared with placebo and oral prednisone (low certainty).

1 finding from 1 review

Oral methotrexate and oral prednisone vs prednisone or placebo

Adverse events associated with treatment · children and adolescents with active morphea (linear scleroderma, generalised morphea and mixed subtype: linear and circumscribed).

Oral methotrexate and oral prednisone showed no clear difference in primary outcome: Adverse effects compared with placebo and oral prednisone (low certainty).

1 finding from 1 review

Clarithromycin vs placebo

The proportion of participants with good or excellent rash improvement within 2 weeks, as rated by the participant · pityriasis rosea

The review found no eligible studies for this question.

1 finding from 1 review

Erythromycin vs placebo

The proportion of participants with good or excellent rash improvement within 2 weeks, as rated by a medical practitioner · pityriasis rosea

Erythromycin showed no clear difference in the proportion of participants with good or excellent rash… compared with placebo (low certainty).

1 finding from 1 review

Erythromycin vs placebo

Adverse events: minor gastrointestinal symptoms · pityriasis rosea

Erythromycin showed no clear difference in minor participant‐reported adverse events not requiring withdrawal… compared with placebo (moderate certainty).

1 finding from 1 review

Azithromycin vs placebo or vitamins

The proportion of participants with good or excellent rash improvement within 2 weeks, as rated by the participant · pityriasis rosea

The review found no eligible studies for this question.

1 finding from 1 review

Azithromycin vs placebo or vitamins

The proportion of participants with resolution of itch within 2 weeks, as rated by the participant · pityriasis rosea

Azithromycin showed no clear difference in the proportion of participants with resolution of itch within 2… compared with placebo or vitamins (moderate certainty).

1 finding from 1 review

Azithromycin vs placebo or vitamins

The proportion of participants with good or excellent rash improvement within 2 weeks, as rated by a medical practitioner · pityriasis rosea

Azithromycin showed no clear difference in the proportion of participants with good or excellent rash… compared with placebo or vitamins (low certainty).

1 finding from 1 review

Azithromycin vs placebo or vitamins

Minor participant‐reported adverse events not requiring withdrawal of the treatment: Mild abdominal pain. · pityriasis rosea

Azithromycin showed no clear difference in minor participant‐reported adverse events not requiring withdrawal… compared with placebo or vitamins (moderate certainty).

1 finding from 1 review