Table 1.

Relative rates of breast cancer incidence from the APC model

EffectRelative rate* (95% confidence interval)
Initial screen1.73 (1.67-1.80)
2nd screen1.18 (1.14-1.23)
3rd screen1.25 (1.20-1.30)
4th screen1.35 (1.29-1.42)
1st time period after screening0.88 (0.86-0.90)
2nd time period after screening0.92 (0.90-0.94)
3rd period after screening0.97 (0.94-1.00)
HRT prevalence1.55 (1.37-1.75)
  • * Adjusted for all other terms in the model.