1. A method for comparing two groups of records comprising: receiving a medical code; searching a database stored on a data storage device to obtain a first group of records associated with individuals having the medical code, wherein each record of the first group of records is identified by a test code; searching the database to obtain a second group of records associated with a control population, wherein each record of the second group of records is identified by the test code; and generating an output comprising a distribution graph on a shared scale from the first and second group of records.