Invasive Breast Cancer Incidence by Age at Diagnosis for Females,
Wayne County, 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 245   42.5 ±3.0 842   312.1 ±11.7 283   414.8 ±26.5
2017-2019 245   42.6 ±3.1 836   312.2 ±11.8 281   410.1 ±26.3
2016-2018 234   40.5 ±3.0 823   307.4 ±11.7 285   420.1 ±26.7
2015-2017 232   40.1 ±2.9 830   310.7 ±11.7 272   403.6 ±26.3
2014-2016 238   40.8 ±3.0 867   325.9 ±12.0 283   417.5 ±26.7
2013-2015 245   41.6 ±3.0 884   334.6 ±12.2 300   439.1 ±27.2
2012-2014 264   44.3 ±3.1 862   328.8 ±12.2 315   456.9 ±27.5
2011-2013 267   44.3 ±3.0 825   318.0 ±12.0 315   450.3 ±27.2
2010-2012 266   43.4 ±3.0 791   308.3 ±11.9 300   424.6 ±26.3
2009-2011 263   42.2 ±2.9 777   307.2 ±12.0 305   425.9 ±26.2
2008-2010 266   41.8 ±2.9 743   298.0 ±11.9 306   422.6 ±25.9
2007-2009 277   42.4 ±2.9 723   294.1 ±11.9 314   429.0 ±26.0
2006-2008 281   41.8 ±2.8 718   296.7 ±12.1 299   404.2 ±25.1
2005-2007 299   43.3 ±2.8 741   310.8 ±12.4 309   413.2 ±25.3
2004-2006 321   45.4 ±2.8 741   314.7 ±12.6 303   402.1 ±24.9
2003-2005 335   46.4 ±2.8 726   312.2 ±12.6 321   423.1 ±25.4
2002-2004 323   43.8 ±2.7 730   317.2 ±12.8 339   445.8 ±25.9
2001-2003 306   40.9 ±2.6 751   328.8 ±13.0 351   460.4 ±26.3
2000-2002 295   38.8 ±2.5 755   332.5 ±13.1 349   458.7 ±26.2
1999-2001 313   40.7 ±2.6 770   340.9 ±13.3 347   456.6 ±26.2
1998-2000 330   42.4 ±2.6 763   338.6 ±13.3 347   457.7 ±26.3
1997-1999 331   42.0 ±2.6 804   356.8 ±13.6 360   477.4 ±26.8
1996-1998 322   40.4 ±2.5 804   356.4 ±13.6 350   465.7 ±26.6
1995-1997 328   41.0 ±2.5 817   360.5 ±13.6 352   472.1 ±26.9
1994-1996 340   42.4 ±2.6 790   346.3 ±13.4 327   443.5 ±26.3
1993-1995 333   41.5 ±2.5 801   347.8 ±13.3 335   459.9 ±26.9
1992-1994 310   38.6 ±2.5 822   354.0 ±13.4 325   453.3 ±26.9
1991-1993 308   38.2 ±2.4 852   363.9 ±13.5 341   482.9 ±27.9
1990-1992 323   40.1 ±2.5 873   369.4 ±13.5 346   499.3 ±28.6
1989-1991 322   40.0 ±2.5 869   363.6 ±13.3 342   502.8 ±28.9
1988-1990 311   38.6 ±2.5 860   354.1 ±13.1 337   502.7 ±29.1
1987-1989 289   35.6 ±2.4 854   345.5 ±12.8 320   481.1 ±28.7
1986-1988 286   35.1 ±2.3 843   335.2 ±12.5 310   470.7 ±28.5
1985-1987 281   34.5 ±2.3 839   328.5 ±12.3 297   453.9 ±28.2
             

 

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