Invasive Cancer Incidence by Age at Diagnosis

Table 16-A
Invasive Breast Cancer Incidence by Age at Diagnosis for Females,
Michigan Residents, 1985 - 2020
Year of Diagnosis	Less than 50		50 - 74		75 and Older
Year of Diagnosis	Average Number	Age-specific Rate	Average Number	Age-specific Rate	Average Number	Age-specific Rate
2018-2020	1,303	42.6 ±1.3	5,002	313.5 ±4.8	1,648	395.6 ±10.5
2017-2019	1,314	42.9 ±1.3	5,051	318.4 ±4.9	1,682	403.9 ±10.6
2016-2018	1,316	42.8 ±1.3	5,021	317.9 ±4.9	1,672	410.3 ±10.8
2015-2017	1,300	42.1 ±1.3	4,895	311.8 ±4.9	1,620	404.8 ±10.8
2014-2016	1,287	41.5 ±1.3	4,888	314.2 ±4.9	1,562	394.0 ±10.7
2013-2015	1,305	41.9 ±1.3	4,819	313.7 ±4.9	1,556	394.8 ±10.8
2012-2014	1,358	43.3 ±1.3	4,778	315.9 ±5.0	1,551	394.9 ±10.8
2011-2013	1,405	44.4 ±1.3	4,678	315.0 ±5.0	1,596	407.7 ±11.0
2010-2012	1,392	43.6 ±1.3	4,487	308.2 ±5.0	1,548	396.3 ±10.8
2009-2011	1,390	43.1 ±1.3	4,339	304.7 ±5.0	1,548	397.4 ±10.9
2008-2010	1,424	43.6 ±1.3	4,142	297.9 ±5.0	1,545	397.0 ±10.9
2007-2009	1,474	44.4 ±1.3	4,075	300.5 ±5.1	1,586	407.7 ±11.0
2006-2008	1,525	45.1 ±1.3	3,937	298.1 ±5.2	1,573	404.6 ±11.0
2005-2007	1,567	45.7 ±1.3	3,898	303.0 ±5.3	1,573	406.3 ±11.0
2004-2006	1,608	46.3 ±1.3	3,824	304.8 ±5.4	1,562	406.0 ±11.1
2003-2005	1,619	46.1 ±1.3	3,784	309.0 ±5.5	1,593	416.8 ±11.2
2002-2004	1,587	44.9 ±1.3	3,883	324.6 ±5.7	1,626	428.5 ±11.4
2001-2003	1,570	44.1 ±1.2	3,964	338.9 ±5.8	1,663	442.3 ±11.6
2000-2002	1,551	43.4 ±1.2	4,044	353.0 ±6.0	1,692	455.2 ±11.8
1999-2001	1,563	43.7 ±1.2	3,993	355.6 ±6.1	1,703	463.7 ±12.0
1998-2000	1,554	43.3 ±1.2	3,937	357.1 ±6.2	1,697	468.2 ±12.1
1997-1999	1,558	43.4 ±1.2	3,863	356.5 ±6.2	1,660	465.0 ±12.2
1996-1998	1,542	42.9 ±1.2	3,756	352.8 ±6.2	1,597	455.6 ±12.2
1995-1997	1,511	42.1 ±1.2	3,707	352.9 ±6.3	1,575	459.2 ±12.4
1994-1996	1,468	41.0 ±1.2	3,616	348.0 ±6.3	1,527	455.6 ±12.5
1993-1995	1,431	40.2 ±1.2	3,596	348.4 ±6.3	1,541	470.5 ±12.8
1992-1994	1,423	40.1 ±1.2	3,576	349.3 ±6.3	1,525	476.7 ±13.0
1991-1993	1,421	40.2 ±1.2	3,634	358.0 ±6.4	1,582	507.2 ±13.5
1990-1992	1,408	40.0 ±1.2	3,698	366.9 ±6.5	1,597	526.7 ±14.0
1989-1991	1,374	39.3 ±1.2	3,643	362.9 ±6.5	1,538	521.8 ±14.1
1988-1990	1,306	37.6 ±1.2	3,591	358.1 ±6.5	1,429	498.3 ±14.0
1987-1989	1,254	36.2 ±1.1	3,498	348.7 ±6.4	1,310	468.4 ±13.8
1986-1988	1,214	35.2 ±1.1	3,420	340.6 ±6.3	1,222	448.0 ±13.7
1985-1987	1,188	34.7 ±1.1	3,292	328.0 ±6.2	1,147	430.4 ±13.6

Notes:	Age-specific Rate is per 100,000 population in a specific age group. Adding and subtracting the number shown after the ± symbol from the rate creates a confidence interval indicating that the true rate lies between the lower and upper bounds of this interval with 95% statistical confidence. COVID-19 Pandemic: In 2020, the highly publicized impact of the COVID-19 pandemic on health services and the consequential delays and reductions in cancer screening and diagnosis led to a decline in the 2020 incidence rates for most cancer sites. Because 2020 was a temporary, anomalous year, it can bias estimates such as cancer incidence trends. Average Number is the number of new invasive cancer cases diagnosed in the period, divided by the number of years in the period. Case: A case is defined as a person with any newly diagnosed cancer with a behavior code of 3 (malignant primary site). Both in-situ and invasive urinary bladder cancer cases are included, in order to be consistent with national tabulations from the National Cancer Institute.
Source:	Michigan Resident Cancer Incidence File. Updated with cases processed through November 30, 2022. Division for Vital Records & Health Statistics, Michigan Department of Health & Human Services.
Last Updated:	April 13, 2023