| 
      
        |  | β=0.8 | β=0.9 |  
        |  | κ=2.3 ρ=0.698 |  
        | Δa |  | 1-P0 | ELc | Medd |  | 1-P0 | ELc | Medd |  
        | Initial Screening Age t0=40 |  
        | 1 Year | 15.3 | 84.7 | 2.09 | 4.5 | 12.65 | 87.35 | 1.69 | 4.4 |  
        | 2 Years | 40.08 | 59.92 | 0.73 | 4.1 | 35.27 | 64.73 | 0.75 | 4.2 |  
        | Initial Screening Age t0=50 |  
        | 1 Year | 15.3 | 84.7 | 3.08 | 2.1 | 12.55 | 87.45 | 1.9 | 2 |  
        | 2 Years | 39.5 | 60.5 | 1.29 | 2.1 | 34.69 | 65.31 | 1.7 | 2 |  
        | Initial Screening Age t0=60 |  
        | 1 Year | 15.42 | 84.58 | 3.29 | 1.7 | 12.51 | 87.49 | 2.97 | 1.6 |  
        | 2 Years | 38.87 | 61.13 | 1.6 | 1.7 | 34.03 | 65.97 | 1.66 | 1.6 |  | 
  |
  
    | aTime between screenings (ti–ti-1) bP0=P(L=0|D=1)=Probability of no early detection (%)
 cThe mean lead time is in years
 dThe median when L>0 (for non-interval cases)
 | 
  
    | Table 5: A projection of the lead time distribution for women when mean sojourn    time=2 years. |