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Table 1 Relationship of study groups to total population of women eligible for and invited to the first screening round in East Anglia

From: Impact of false-positive mammography on subsequent screening attendance and risk of cancer

Group Number Percent
All women eligible for screening in the first round 203,194 100.0
   Those not aged 49–63 years and hence ineligible for reinvitation to the second round 337,668 16.6
   Those not invited as routine first screen 7272 3.6
   Those not invited within schedule (see Methods) 21,769 10.7
   Those eligible for reinvitation, invited as routine first screen, within schedule 140,387 69.1
Those eligible for reinvitation, invited as routine first screen, within schedule 140,387 100.0
   Those judged normal at first screen (nonassessed normal group)a 108,617 77.4
   Nonresponders to first invitation 24,048 17.0
   Technical (and clinical) recalls 1385 1.0
   Those assessed immediately after first screen and judged normal (assessed normal group)a 4278 3.0
   Those assessed immediately after first screen then undergoing benign biopsy (assessed benign group)a 514 0.4
   Those assessed immediately after first screen then diagnosed with cancer 680 0.5
   Those assessed immediately after first screen and put on early recall 753 0.5
   Those assessed immediately after first screen then undergoing delayed episode completion (includes nonresponders, delayed responders, those who moved or died, etc.) 112 0.1
  1. a Total in study groups (nonassessed normal + assessed normal + assessed benign) = 113,409 (80.8% of total study population).