Means and SDs for study groups on screening intentions and mediator variables
| Variable | Intervention group (n=406) | Control group (n=405) | |
| Mean (SD) | Mean (SD) | p Value | |
| Overdetection knowledge | 6.2 (2.2) | 4.0 (1.6) | <0.001 |
| Breast cancer worry | 1.7 (0.7) | 1.8 (0.7) | <0.001 |
| Screening attitudes | 24.5 (4.4) | 26.1 (4.1) | <0.001 |
| Anticipated regret | 1.9 (1.7) | 2.5 (1.6) | <0.001 |
| Screening intentions | 4.1 (1.1) | 4.5 (0.9) | <0.001 |
Possible score ranges were as follows: overdetection knowledge 0–10, breast cancer worry 1–4, attitudes 6–30, anticipated regret −4 to 4, intentions 1–5. See (online supplementary appendix 1) for further details on measures. Groups were compared here using t-tests.