Case-Control Matching

The case-control matching algorithm matches a predefined set of case patients to patients in a control pool. A single case is matched to one or more controls based on data points in common (age, gender, race, number of healthcare encounters, etc...). Data points are binned and converted to their corresponding bin value prior to matching. The i2b2 user running the application indicates the fields to be binned in the PATIENT_DIMENSION table and the number of intervals (bins) for each field. Numeric fields are binned using NTILE. Character string fields are ranked by frequency; any value with a rank greater than the user supplied threshold is converted to 0 for "other".

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The first version of the Control Matcher is written for MS SQL Server.

Downloads

Contact

Vivian Gainer
Director, Phenotyping Core
Partners HealthCare
vsgainer@partners.org

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