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%

Incentives vs no incentives

Smoking cessation in mixed populations ‐ Longest · s

Incentives leads to higher smoking cessation in mixed populations ‐ Longest compared with no incentives (high certainty).

1 finding from 1 review

Incentives vs no incentives

Smoking cessation in pregnancy at longest · Pregnant women who smoke

Incentives probably leads to higher smoking cessation in pregnancy at longest compared with no incentives (moderate certainty).

1 finding from 1 review

Biomedical risk assessment vs Control (waitlist, routine/standard oral health education, or minimal intervention)

Smoking cessation · people who smoke

Biomedical risk assessment showed no clear difference in feedback on smoking exposure Smoking cessation at longest compared with standard care or minimal intervention (moderate certainty).

3 findings from 1 review

Intervention not reported

Long‐term adverse effects or toxicity · people with rheumatoid arthritis

The review found no eligible studies for this question.

1 finding from 1 review

Intervention not reported

Long‐term abstinence (all randomised) Measured as self‐reported and biochemical validation at 6 to 12 months · people who smoke

The intervention probably leads to higher long‐term abstinence (all randomised) Measured as self‐reported and… (moderate certainty).

1 finding from 1 review