Table II.

Attendance, recall and invasive screen detected cancer rates and positive predictive values (PPV) in the Sami and control group, 2001–2010

	Sami group
	50–59 years n=5,545		60–69 years n=4,577		Total n=10,122
	n	%	n	%	n	%
Attending	4,309	77.7	3,614	79.0	7,923	78.3
Recall (total)	116	2.7	74	2.0	190	2.4
Positive mammography	91	2.1	57	1.6	148	1.9
Technical reasons	11	0.3	5	0.1	16	0.2
Self defined lump	14	0.3	12	0.3	26	0.3
Cancer detection
Invasive screen-detected	16	0.3	10	0.3	26	0.3
PPV-1†	17.6		17.5		17.6
	Non-Sami population
	n=5,804		n=4,554		n=10,358
	n	%	n	%	n	%
Attending	4,425	76.2*	3,338	74.9*	7,762	74.9*
Recall (total)	168	3.8	86	2.2	254	3.3
Positive mammography	133	3.0	73	1.8	206	2.7*
Technical reasons	13	0.3	10	0.3	24	0.3
Self defined lump	21	0.5	3	0.1	24	0.3
Cancer detection
Invasive screen-detected	20	0.5	18	0.3	38	0.5
PPV-1†	15.0		24.7		18.4

The Norwegian Breast Cancer Screening Program (NBCSP) database was used.

^*Chi square p-value<0.05 between Sami and Non-Sami populations.

^†Positive predictive value-1: invasive breast cancers detected among women recalled due to mammographic findings.