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Table 2 Coverage, interval cancer and false positive rates during the first four invitation rounds of the Danish pioneer screening mammography programs in the municipality of Copenhagen (1991–1998) and the county of Funen (1994–2001)

From: Outcome of breast cancer screening in Denmark

  Invitation round
  First % Second % Third % Fourth %
Copenhagen
 Coverage by examination 71 (70–71) 63 (63–64) 63 (62–63) 63 (63–64)
 Interval cancer rate 14 (11–17) 28 (23–35) 27 (22–34) 33 (27–39)
 False positive rate 5.5 (5.2–5.7) 3.9 (3.6–4.1) 2.5 (2.3–2.7) 2.4 (2.2–2.6)
Funen
 Coverage by examination 85 (84–85) 83 (83–84) 82 (82–83) 84 (84–84)
 Interval cancer rate 18 (15–22) 34 (30–39) 39 (34–44) 32 (28–37)
 False positive rate 1.7 (1.6–1.9) 1.1 (1.0–1.2) 1.1 (1.0–1.2) 1.0 (0.9–1.1)
  1. Percent and 95% confidence intervals