| Methods |
Population‐based randomised trial investigating a combination of screening by clinical examination of the breast combined with instructions in the technique of breast self‐examination. Cluster randomisation. |
| Participants |
Women aged 35‐64 years. In total 404,947 women were randomised, 216,884 to the intervention arm and 188,063 to control. |
| Interventions |
Five rounds of screening were planned using clinical examination of the breast combined with instructions in the technique of breast self‐examination at intervals of 1‐2 years. |
| Outcomes |
The primary endpoint of the study was mortality. |
| Notes |
Because of poor compliance with follow up of screen‐positive women, the active intervention was discontinued after completion of the first screening round in December 1997. |
| Risk of bias |
| Bias |
Authors' judgement |
Support for judgement |
| Allocation concealment? |
Unclear risk |
B ‐ Unclear |
