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Each row is one question a systematic review asked: who, what, compared with what, and which outcome, with the effect it found and how certain that is. Words match anywhere in the field.

Population

Intervention or exposure

Comparison

Outcome

Any field or review title

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Review versions

1 questions in 1 reviews · cluster CL0003

current versions

No studies 0 · 0%Ungraded 0 · 0%Very low 0 · 0%Low 1 · 100%Moderate 0 · 0%High 0 · 0%

Ungraded means an effect was reported without a GRADE rating; it is not a gap. No studies means the review found nothing to answer the question. The six categories are a display order, not a score.

Intervention categories, outcome domains and clusters are a proposed key pending human validation. Clear all filters

Question	Effect	Evidence	Status / GRADE
Periodontitis / periodontal disease (history or clinical diagnosis) vs No periodontitis (individuals without periodontal disease) Oral cancer (OC) · Adults in case-control studies of oral cancer; people assessed for periodontitis · Not specified, Overall (random-effects pooled estimate) Periodontitis and the risk of oral cancer: a meta-analysis of case-control studies. (2024)	OR 2.94 [2.13, 4.07]	8 studies · 6927 participants	Low