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Table 2 Likelihood of presentation of interval cancer following an initial screen, and of detection of cancer by screening at the second screening round, by assessment status

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

   Women with/without cancer   
Study group Total (n) With (n) Without (n) Rate with per 1000 screened (95% CI) Odds ratio (95% CI)
Women with/without interval cancer      
   All groups 113,409 375 113,034 3.31 (2.97–3.64) -
   Nonassessed normal 108,617 329 108,288 3.03 (2.70–3.35) 1.00
   Assessed normal 4278 42 4236 9.82 (6.86–12.77) 3.26 (2.36–4.51)
   Assessed benign 514 4 510 7.78 (0.19–15.38) 2.58 (0.96–6.95)
   All assessed 4792 46 4746 9.60 (6.83–12.36) 3.19 (2.34–4.35)
Women with/without second round screen-detected cancer      
   All groups 113,409 463 112,946 4.08 (3.71–4.45) -
   Nonassessed normal 108,617 423 108,194 3.89 (3.52–4.26) 1.00
   Assessed normal 4278 39 4239 9.12 (6.27–11.96) 2.35 (1.69–3.27)
   Assessed benign 514 1 513 1.95 (0–5.75) 0.50 (0.07–3.55)
   All assessed 4792 40 4752 8.35 (5.77–10.92) 2.15 (1.55–2.98)