Summary of findings 4. Preconception lifestyle advice on smoking compared to routine care or attention control for people with infertility.

Preconception lifestyle advice on smoking compared to routine care or attention control for people with infertility
Patient or population: smoking people with infertility Setting: university/hospital Intervention: preconception lifestyle advice on smoking Comparison: routine care
Outcomes	Anticipated absolute effects* (95% CI)		Relative effect (95% CI)	№. of participants (studies)	Certainty of the evidence (GRADE)	Comments
	Risk with routine care or attention control	Risk with preconception lifestyle advice on smoking
Live birth or ongoing pregnancy	‐	‐	‐	‐	‐	No studies reported on this outcome
Adverse events	‐	‐	‐	‐	‐	No studies reported on this outcome
Miscarriage	‐	‐	‐	‐	‐	No studies reported on this outcome
Reported behavioural changes: smoking	‐	‐	‐	‐	‐	In the single study in this comparison, study authors concluded, "There were no significant differences in the mean delta stage‐of‐change or 12‐month rate of maintained cessation". The rate of maintained cessation was not reported separately for intervention and control groups
*The risk in the intervention group (and its 95% confidence interval) is based on the assumed risk in the comparison group and the relative effect of the intervention (and its 95% CI). CI: confidence interval.
GRADE Working Group grades of evidence. High quality: further research is very unlikely to change our confidence in the estimate of effect. Moderate quality: further research is likely to have an important impact on our confidence in the estimate of effect and may change the estimate. Low quality: further research is very likely to have an important impact on our confidence in the estimate of effect and is likely to change the estimate. Very low quality: we are very uncertain about the estimate.