Table 3.

Size (mm) of invasive cancers diagnosed within BreastScreen Victoria characterized by age and time since previous negative screen

Time since previous negative screen (mo)Age group
40-4950-6970-74≥75Total
<27
    No. screened6,245204,09241,74516,580
    Invasive cancers
    Cancers (n)261,751414822,273
    Mean size16.9713.6613.3512.71
27-36
    No. screened4,12424,8974,1653,000
    Invasive cancers
    Cancers (n)241733617250
    Mean size17.2514.1713.0812.41
≥37
    No. screened4,49315,5031,5411,986
    Invasive cancers
    Cancers (n)161161926177
    Mean size17.5116.9115.2117.46
P*0.70.0050.60.08
  • * Two-sided P's from a regression of log size and time since previous negative screen for each age group.