Table 1 Desciptives (averages from 200 simulations) for the simulated datasets without screening and with screening assuming moderate screening sensitivity and imperfect attendance
From: Assessing lead time bias due to mammography screening on estimates of loss in life expectancy
| Â | No screening | Screening |
|---|---|---|
Number diagnosed | 2955 | 3010 |
Mean age at diagnosis | 61 | 60 |
25th percentile of age | 50 | 49 |
Median age | 62 | 61 |
75th percentile of age | 73 | 72 |
% Dead within 12 years | 63.0 | 60.9 |
% Size smaller than 17.5 | 39.0 | 56.8 |
% Size 17.5–32.5 | 44.2 | 30.2 |
% Size 32.5–47.5 | 12.2 | 8.9 |
% Size larger than 47.5 | 4.6 | 4.1 |