Table 1. Participants in first–fifth invitation round of the mammography screening programme in Copenhagen, Denmark, 1991–2001. Women aged 50–69 years at the start of each invitation round.

	Outcome of screening
	Breast cancer				Negative,			One view in %
Invitation round	Invasive	DCIS	Total	Negative, fatty	mixed/dense	Othersa	Total	of all negative
First, 1 April 1991–25 April 1993	316	44	360	15 805	14 197	33	30 395	53
Second, 26 April 1993–31 May 1995b	162	21	183	14 615	13 779	28	28 605	51
Third, 1 June 1995–24 March 1997	136	18	154	11 666	13 317	13	25 150	47
Fourth, 25 March 1997–19 April 1999	129	18	147	10 670	14 602	9	25 428	42
Fifth, 20 April 1999–31 March 2001	123	22	145	8985	15 928	4	25 062	36
Total	866	123	989	61 741	71 823	87	134 640	46

Abbreviation: DCIS=ductal carcinoma in situ.

^aCoding errors.

^bThe invitation round targeted women aged 50–71 years.