Summary of evidence on outcomes
| Outcome measure | No of studies | Studies with significant positive effect | Studies with no effect | Best evidence synthesis |
| Screening | ||||
| Preferences for screening | 2 | One medium-quality/high-quality and one high-quality RCT | None | Evidence of positive effect |
| Intention to attend screening | 8 | One medium-quality RCT* | One high-quality, one medium-quality/high-quality and four medium-quality RCTs* | Evidence of no effect |
| Attendance at screening | 12 | One high-quality RCT | Two high-quality, two medium-quality/high-quality and seven medium-quality studies | Evidence of no effect |
| Health-related behaviours | ||||
| Intention to change health-related behaviours | ||||
| To tan | 1 | One low/medium RCT | None | Limited evidence of positive effect |
| To protect skin | 1 | None | One low/medium RCT | Limited evidence of no effect |
| Health-related behaviours | ||||
| Smoking cessation | 1 | None | One high-quality RCT | Limited evidence of no effect |
| Smoking abstinence | 1 | One high-quality RCT | None | Limited evidence of positive effect |
| Sun protection | 2 | Two medium-quality RCTs | Indicative evidence of positive effect | |
| Tanning bed usage | 1 | None | One low/medium RCT | Limited evidence |
| Adult skin examination | 2 | Two medium-quality RCTs | None | Indicative evidence of positive effect |
| Child skin examination | 1 | None | One medium-quality RCT | Limited evidence of no effect |
| Breast examination | 3 | Two high-quality RCTs | One medium/high RCT | Indicative evidence of positive effect |
| Diet | 0 | None | None | No evidence |
| Physical activity | 0 | None | None | No evidence |
| Alcohol | 0 | None | None | No evidence |
*One medium-quality study reported a significant positive effect in low-risk women and no effect in high-risk women.
RCT, randomised controlled trial.