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

		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)