Figure 12. Trends in the Prevalence Rates of Chromosomal Defects
Michigan Residents, 1994 - 2013

Notes:   Rates Are Per 10,000 Michigan Born Resident Live Births.  Rates include all children reported with a birth defect who were born in Michigan and whose mother was a resident at the time of birth. This enables the calculation of birth defects prevalence rates. Birth defect statistics sometimes reflect trends related to data reporting or new testing. See Data Quality Considerations for further details.
Unstable Rates:In order to produce a meaningful graph, some single-year, unreliable rates were smoothed using additional years of data. Conditions are reportable if identified within the first two years of a child's life. The prevalence frequencies used to calculate the rates in this table represent cases diagnosed within the first year of life.
Diagnoses are coded using the 9th revision to the International Classification of Diseases - ICD 9 CM.  Diagnostic Code Groupings used for congenital anomaly codes are as used by the Centers for Disease Control. (See Birth Defect Groups and ICD-9-CM Diagnosis Codes for the codes used to categorize birth defects.)
Source: Michigan Birth Defects Registry, Division for Vital Records & Health Statistics, Michigan Department of Health & Human Services
Reports Processed through January 10, 2016

Last Updated on August 1, 2016