Table 1.

Age-specific estimates for median mammography threshold (MT) and mean doubling time (DT)^*

Age, y†	Median MT, cm	Mean DT, d
<40	1.63	179
40–49	1.44	206
50–59	1.25	233
60–69	1.07	260
≥70	0.88	288
50–69	1.16	247

^*The cumulative distribution function for the MT is shown in Supplementary Figure 2 (available online) for women aged 40–49 vs 50–69 years.

^†Patients’ age at mammography screening in case of median MT and age at clinical diagnosis in case of mean DT.