Invasive Breast Cancer Incidence by Age at Diagnosis for Females,
Branch-Hillsdale-St. Joseph Health Department,
Michigan Residents, 1985 - 2020
Year of
Diagnosis		 Less than 50 50 - 74 75 and Older
Average
Number		 Age-specific
Rate		 Average
Number		 Age-specific
Rate		 Average
Number		 Age-specific
Rate
2018-2020 18   39.5 ±10.6 71   295.4 ±38.2 19   288.0 ±72.1
2017-2019 19   42.6 ±11.0 63   259.4 ±36.0 22   328.2 ±76.6
2016-2018 16   36.3 ±10.2 71   294.4 ±38.2 25   376.5 ±82.4
2015-2017 12   27.1 ±8.8 71   293.6 ±38.2 26   398.3 ±85.2
2014-2016 12   26.9 ±8.7 76   319.0 ±39.8 21   327.1 ±78.2
2013-2015 14   29.7 ±9.1 63   266.7 ±36.8 20   312.3 ±76.6
2012-2014 16   35.3 ±9.9 63   266.5 ±36.9 17   265.0 ±71.1
2011-2013 16   34.9 ±9.8 60   259.8 ±36.7 19   296.9 ±74.9
2010-2012 16   34.4 ±9.6 61   264.8 ±37.3 20   308.6 ±76.4
2009-2011 15   31.8 ±9.2 63   278.4 ±38.5 20   310.5 ±76.9
2008-2010 17   35.3 ±9.6 63   286.8 ±39.4 21   328.1 ±79.0
2007-2009 18   35.3 ±9.5 64   295.8 ±40.4 22   355.5 ±82.0
2006-2008 18   35.3 ±9.4 61   286.0 ±40.2 26   414.9 ±88.0
2005-2007 16   30.9 ±8.8 53   255.0 ±38.5 27   428.8 ±89.6
2004-2006 17   33.1 ±9.0 49   238.8 ±37.7 25   406.1 ±87.9
2003-2005 18   33.4 ±9.0 53   263.7 ±39.9 24   386.7 ±86.3
2002-2004 20   37.5 ±9.5 62   317.0 ±43.9 23   377.7 ±85.6
2001-2003 21   39.1 ±9.6 66   344.9 ±46.1 25   419.5 ±90.1
2000-2002 23   42.0 ±10.0 62   331.1 ±45.8 25   417.3 ±90.2
1999-2001 25   46.8 ±10.5 58   316.5 ±45.3 22   363.7 ±85.2
1998-2000 22   40.5 ±9.7 53   297.0 ±44.5 22   376.6 ±86.7
1997-1999 19   35.5 ±9.1 52   295.3 ±44.8 23   391.2 ±88.5
1996-1998 17   30.4 ±8.5 54   315.1 ±46.6 22   377.5 ±87.5
1995-1997 16   29.9 ±8.4 51   300.3 ±46.0 18   311.1 ±80.6
1994-1996 19   35.7 ±9.2 50   300.5 ±46.3 17   296.7 ±79.3
1993-1995 17   32.2 ±8.8 47   285.1 ±45.4 19   329.4 ±83.6
1992-1994 19   36.1 ±9.3 55   337.3 ±49.3 24   423.7 ±94.1
1991-1993 15   27.9 ±8.2 58   354.9 ±50.7 24   435.2 ±95.9
1990-1992 16   29.8 ±8.5 63   388.7 ±53.1 29   541.2 ±106.3
1989-1991 18   33.1 ±8.9 59   364.5 ±51.6 27   499.1 ±103.4
1988-1990 19   36.5 ±9.4 57   352.0 ±50.8 29   554.0 ±109.2
1987-1989 19   36.1 ±9.4 51   318.0 ±48.4 26   500.4 ±105.7
1986-1988 18   33.8 ±9.1 48   297.1 ±46.9 25   499.8 ±107.0
1985-1987 17   32.8 ±9.0 47   293.0 ±46.6 19   393.9 ±97.3
             

 

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