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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).