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Evidence found and GRADE certainty

169 questions · 174 findings · 18 reviews · Skin

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No studies found 53 · 30.5%GRADE not reported 13 · 7.5%Very low 23 · 13.2%Low 41 · 23.6%Moderate 34 · 19.5%High 10 · 5.7%

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

Acyclovir vs placebo, vitamins, or no treatment

Minor adverse events not leading to withdrawal of treatment · pityriasis rosea

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

1 finding from 1 review

Acyclovir + calamine + cetirizine vs calamine + cetirizine

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

Acyclovir + calamine + cetirizine showed no clear difference in minor participant‐reported adverse events not requiring withdrawal… compared with calamine + cetirizine (low certainty).

1 finding from 1 review

Clarithromycin vs placebo

Minor adverse events not leading to withdrawal of treatment · pityriasis rosea

The review found no eligible studies for this question.

1 finding from 1 review

Daily application of sunscreen vs discretionary use

Cutaneous squamous cell carcinoma Confirmed clinically or by histopathology · general participants

Daily application of sunscreen showed no clear difference in cutaneous squamous cell carcinoma Confirmed clinically or by… compared with discretionary use (low certainty).

1 finding from 1 review

Herbal medicines vs antibiotics alone

Remission · participants with acne

Herbal medicine showed no clear difference in secondary outcome: number of participants with remission (ITT‐best… compared with antibiotics (low certainty).

2 findings from 1 review

Mohs micrographic surgery vs surgical excision

Recurrence · adults with basal cell carcinoma of the skin

Mohs micrographic surgery showed no clear difference in recurrence at 3 years compared with surgical excision (low certainty).

2 findings from 1 review

Radiotherapy vs surgical excision

Recurrence · adults with basal cell carcinoma of the skin

Radiotherapy may leads to higher recurrence at 3 years compared with surgical excision (with or without frozen section margin control) (low certainty).

2 findings from 1 review

Radiotherapy vs surgical excision

Cosmetic outcome (good/excellent) · adults with basal cell carcinoma of the skin

Radiotherapy probably leads to lower cosmetic outcome (good/excellent) compared with surgical excision (with or without frozen section margin control) (moderate certainty).

1 finding from 1 review

Imiquimod vs MAL‐PDT

Recurrence · adults with basal cell carcinoma of the skin

Imiquimod cream probably leads to lower recurrence at 3 years compared with MAL‐PDT (moderate certainty).

2 findings from 1 review

Imiquimod vs MAL‐PDT

Cosmesis · adults with basal cell carcinoma of the skin

Imiquimod cream showed no clear difference in cosmetic outcome (excellent/good) compared with MAL‐PDT (moderate certainty).

1 finding from 1 review