From: Assessing lead time bias due to mammography screening on estimates of loss in life expectancy
Attendance | Screening | Number diagnosed | % screen detected | Lead time (mean) | Lead time (median) |
---|---|---|---|---|---|
Perfect | Low | 2999 (2901–3098) | 35.2 (33.7–37.1) | 2.01 (1.83–2.22) | 1.01 (0.92–1.10) |
Perfect | Moderate | 3028 (2925–3136) | 45.1 (43.2–47.1) | 2.45 (2.27–2.64) | 1.34 (1.22–1.45) |
Perfect | High | 3062 (2959–3171) | 53.0 (51.0–54.9) | 2.98 (2.80–3.22) | 1.72 (1.61–1.84) |
Imperfect | Low | 2988 (2887–3075) | 27.1 (25.1–28.8) | 1.98 (1.74–2.27) | 1.01 (0.91–1.11) |
Imperfect | Moderate | 3010 (2904–3106) | 35.3 (33.7–36.8) | 2.42 (2.22–2.67) | 1.32 (1.19–1.45) |
Imperfect | High | 3035 (2928–3143) | 42.1 (40.6–44.0) | 2.93 (2.71–3.19) | 1.70 (1.55–1.83) |