Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

1,310 questions · 1,358 findings · 214 reviews

No studies found 230 · 16.9%GRADE not reported 169 · 12.4%Very low 269 · 19.8%Low 277 · 20.4%Moderate 291 · 21.4%High 122 · 9%

MAL‐PDT vs red light only

Investigator‐assessed change in non‐inflamed lesions (NILs) Lesion counts · Moderate and severe acne vulgaris
1 finding from 1 review
  • Light therapies for acne 2016 · Cochrane Headline outcomes only
    no estimate extracted
    3 studies · 360 participants
    Moderate

MAL‐PDT vs red light only

Investigator‐assessed percentage change in ILs Lesion counts · Moderate and severe acne vulgaris
1 finding from 1 review
  • Light therapies for acne 2016 · Cochrane Headline outcomes only
    no estimate extracted
    3 studies · 360 participants
    Moderate

MAL‐PDT vs red light only

Investigator‐assessed percentage change in NILs Lesion counts · Moderate and severe acne vulgaris
1 finding from 1 review
  • Light therapies for acne 2016 · Cochrane Headline outcomes only
    no estimate extracted
    3 studies · 360 participants
    Moderate

MAL‐PDT vs red light only

Investigator‐assessed severe adverse effects Application site blister · Moderate and severe acne vulgaris
1 finding from 1 review
  • Light therapies for acne 2016 · Cochrane Headline outcomes only
    no estimate extracted
    3 studies · 360 participants
    Moderate