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Methods of Research

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Methods Overview of data source and collection
I examined a previous study of the trends in Assignment of Bipolar Diagnoses in a sample of foster children where ICD-9 code diagnoses were coded into seven diagnostic categories based on the corresponding DSM-IV TR codes: 1) Bipolar disorders, 2) Other mood disorders, 3) Psychotic disorders, 4) Disruptive disorders (including ADHD, Conduct Disorder, Intermittent Explosive Disorder, Oppositional Defiant Disorder, Disruptive Behavior Disorder Not Otherwise Specified, Impulse Control Disorder Not Elsewhere Classified), 5) Developmental disorders, 6) Anxiety disorders, including PTSD, and 7) Other psychiatric disorders, including personality disorders and adjustment disorders. Clinical diagnoses were assigned by the treating clinician and represent standard practice. I used this data base to show the prevalence in Schizophrenia and Major Depressive disorder in comparison of African American to Caucasian foster children.

The Participants

Two samples for this study were drawn from the Illinois Department of Healthcare and Family Services Medicaid payment database. This database is maintained through interagency agreements between the Illinois Department of Children and Family Services (DCFS), DHFS, and the University of Illinois at Chicago Department of Psychiatry. The data included claims for all medical and psychiatric services including hospitalizations and outpatient visits rendered to foster children. Gender and race/ethnicity data were obtained from a separate DCFS database and linked with Medicaid payment information through the use of the Medicaid Recipient Identification Number; a unique identifier common to both databases. Each individual was then assigned a random subject number unrelated to their RIN for the study a long with a group code that specified what diagnosis they had, gender, race, and

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