Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

2,539 questions · 2,602 findings · 424 reviews · Headline outcomes only

No studies found 572 · 22%GRADE not reported 189 · 7.3%Very low 527 · 20.3%Low 685 · 26.3%Moderate 514 · 19.8%High 115 · 4.4%

Azelaic acid vs clindamycin

Participants' global self‐assessment of acne improvement Good or very good improvement (long term: treatment duration > 8 weeks) · participants with acne

Azelaic acid showed no clear difference in participants' global self‐assessment of acne improvement Good or… compared with clindamycin (low certainty).

1 finding from 1 review

UVA1 vs narrowband UVB

Proportion of participants without relapse in the long term ‐ not reported · chronic palmoplantar pustulosis

The review found no eligible studies for this question.

1 finding from 1 review

Etretinate vs placebo or no treatment

Proportion of participants without relapse in the long term ‐ not reported · chronic palmoplantar pustulosis

It is very uncertain whether etretinate changes proportion of participants without relapse in the long term (6 months) compared with placebo or no treatment (very low certainty).

1 finding from 1 review

Etretinate vs PUVA

Proportion of participants without relapse in the long term ‐ not reported · chronic palmoplantar pustulosis

The review found no eligible studies for this question.

1 finding from 1 review

Alitretinoin vs placebo

Proportion of participants achieving a 50% reduction in disease severity · chronic palmoplantar pustulosis

Alitretinoin showed no clear difference in proportion of participants achieving a 50% reduction in disease… compared with placebo (moderate certainty).

1 finding from 1 review

Etanercept vs placebo

Proportion of participants without relapse in the long term ‐ not reported · chronic palmoplantar pustulosis

The review found no eligible studies for this question.

1 finding from 1 review

Ustekinumab vs placebo

Proportion of participants without relapse in the long term ‐ not reported · chronic palmoplantar pustulosis

The review found no eligible studies for this question.

1 finding from 1 review

Guselkumab vs placebo

Proportion of participants without relapse in the long term ‐ not reported · chronic palmoplantar pustulosis

The review found no eligible studies for this question.

1 finding from 1 review

Secukinumab vs placebo

Proportion of participants without relapse in the long term ‐ not reported · chronic palmoplantar pustulosis

The review found no eligible studies for this question.

1 finding from 1 review

Supine midline head position vs any other supine head position

Long‐term neurodevelopmental outcome ‒not reported · very preterm infants with or at risk of germinal matrix‐intraventricular haemorrhage in preterm infants

The review found no eligible studies for this question.

1 finding from 1 review