Table 16-B
Invasive Breast Cancer Incidence by Age at Diagnosis for Females,
Michigan Residents, 1985 - 2020
Year of
Diagnosis
Less than 30 30 - 39 40 - 49 Less than 50
Average
Number
Age-specific
Rate
Average
Number
Age-specific
Rate
Average
Number
Age-specific
Rate
Average
Number
Age-specific
Rate
2018-2020 48   2.6 ±0.4 279   45.9 ±3.1 976   163.0 ±5.9 1,303   42.6 ±1.3
2017-2019 49   2.6 ±0.4 280   46.8 ±3.2 985   163.3 ±5.8 1,314   42.9 ±1.3
2016-2018 44   2.4 ±0.4 291   48.9 ±3.2 982   160.8 ±5.8 1,316   42.8 ±1.3
2015-2017 37   2.0 ±0.4 276   46.8 ±3.2 987   159.2 ±5.7 1,300   42.1 ±1.3
2014-2016 30   1.6 ±0.3 260   44.2 ±3.1 998   157.8 ±5.6 1,287   41.5 ±1.3
2013-2015 33   1.7 ±0.3 249   42.7 ±3.1 1,024   158.0 ±5.5 1,305   41.9 ±1.3
2012-2014 35   1.9 ±0.4 266   45.6 ±3.2 1,057   158.9 ±5.5 1,358   43.3 ±1.3
2011-2013 41   2.1 ±0.4 265   45.3 ±3.1 1,100   161.3 ±5.5 1,405   44.4 ±1.3
2010-2012 34   1.8 ±0.3 262   44.4 ±3.1 1,097   157.5 ±5.3 1,392   43.6 ±1.3
2009-2011 30   1.5 ±0.3 261   43.7 ±3.1 1,099   154.8 ±5.2 1,390   43.1 ±1.3
2008-2010 26   1.3 ±0.3 283   46.5 ±3.1 1,116   154.1 ±5.2 1,424   43.6 ±1.3
2007-2009 29   1.5 ±0.3 306   49.2 ±3.2 1,140   153.8 ±5.1 1,474   44.4 ±1.3
2006-2008 35   1.7 ±0.3 300   47.0 ±3.1 1,191   156.9 ±5.1 1,525   45.1 ±1.3
2005-2007 41   2.0 ±0.4 302   46.0 ±3.0 1,225   158.0 ±5.1 1,567   45.7 ±1.3
2004-2006 41   2.0 ±0.4 304   45.1 ±2.9 1,263   160.4 ±5.1 1,608   46.3 ±1.3
2003-2005 43   2.1 ±0.4 326   47.2 ±3.0 1,250   157.4 ±5.0 1,619   46.1 ±1.3
2002-2004 37   1.8 ±0.3 322   45.5 ±2.9 1,228   154.4 ±4.9 1,587   44.9 ±1.3
2001-2003 35   1.7 ±0.3 332   45.8 ±2.8 1,203   151.5 ±4.9 1,570   44.1 ±1.2
2000-2002 29   1.4 ±0.3 333   45.1 ±2.8 1,190   150.6 ±4.9 1,551   43.4 ±1.2
1999-2001 33   1.6 ±0.3 335   44.8 ±2.8 1,196   152.8 ±5.0 1,563   43.7 ±1.2
1998-2000 33   1.6 ±0.3 339   44.8 ±2.7 1,183   153.0 ±5.0 1,554   43.3 ±1.2
1997-1999 36   1.7 ±0.3 350   45.5 ±2.7 1,173   153.8 ±5.0 1,558   43.4 ±1.2
1996-1998 34   1.6 ±0.3 358   45.6 ±2.7 1,151   153.0 ±5.1 1,542   42.9 ±1.2
1995-1997 37   1.8 ±0.3 355   44.5 ±2.7 1,120   152.2 ±5.1 1,511   42.1 ±1.2
1994-1996 38   1.8 ±0.3 342   42.4 ±2.6 1,088   152.2 ±5.2 1,468   41.0 ±1.2
1993-1995 38   1.8 ±0.3 352   43.4 ±2.6 1,042   151.1 ±5.3 1,431   40.2 ±1.2
1992-1994 34   1.6 ±0.3 352   43.4 ±2.6 1,037   155.1 ±5.4 1,423   40.1 ±1.2
1991-1993 32   1.5 ±0.3 371   45.8 ±2.7 1,019   157.0 ±5.5 1,421   40.2 ±1.2
1990-1992 30   1.4 ±0.3 372   46.2 ±2.7 1,007   160.2 ±5.7 1,408   40.0 ±1.2
1989-1991 34   1.6 ±0.3 373   46.9 ±2.7 967   159.8 ±5.8 1,374   39.3 ±1.2
1988-1990 35   1.7 ±0.3 353   45.0 ±2.7 918   157.7 ±5.8 1,306   37.6 ±1.2
1987-1989 42   1.9 ±0.3 340   44.0 ±2.7 873   155.8 ±5.9 1,254   36.2 ±1.1
1986-1988 42   1.9 ±0.3 343   45.1 ±2.7 830   155.0 ±6.0 1,214   35.2 ±1.1
1985-1987 45   2.1 ±0.3 351   47.2 ±2.8 792   154.2 ±6.2 1,188   34.7 ±1.1

 

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
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