Incentives leads to higher smoking cessation in mixed populations ‐ Longest compared with no incentives (high certainty).
Incentives probably leads to higher smoking cessation in pregnancy at longest compared with no incentives (moderate certainty).
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).
Text messaging probably leads to higher long‐term abstinence (all randomised) compared with minimal support (moderate certainty).
The intervention probably leads to higher long‐term abstinence (all randomised) Measured as self‐reported and… (moderate certainty).
It is very uncertain whether smartphone app changes long‐term abstinence (all randomised) compared with lower‐intensity support (very low certainty).
Interventions to increase adherence showed no clear difference in long‐term abstinence from smoking (≥ 6 months) compared with standard care (low certainty).
The intervention leads to higher smoking cessation at longest (high certainty).
It is very uncertain whether real‐time video counselling changes smoking cessation (strictest definition and longest compared with telephone counselling (very low certainty).
Cessation interventions with a partner support component showed no clear difference in long‐term smoking abstinence (6 to 9 months) compared with cessation interventions without a partner support component (low certainty).
Cessation interventions with a partner support component showed no clear difference in long‐term smoking abstinence (12 months+) compared with cessation interventions without a partner support component (low certainty).
The intervention probably leads to higher smoking cessation at longest (moderate certainty).
The intervention probably leads to higher smoking cessation at longest (moderate certainty).
The intervention showed no clear difference in smoking cessation at longest (moderate certainty).
Individual counselling leads to higher smoking cessation at longest compared with minimal contact control (high certainty).
More intensive leads to higher smoking cessation at longest compared with less intensive counselling (high certainty).
The intervention showed no clear difference in smoking uptake at longest (low certainty).
It is very uncertain whether the intervention changes smoking uptake at longest (very low certainty).
The intervention leads to higher cessation at longest (high certainty).