US Patent 8738610 Apparatus, system and method for rapid cohort analysis

An apparatus, system, and method for rapid cohort analysis. In one embodiment, the apparatus includes an interface and a processor. The interface may receive an identifier of a first index attribute. The processor may search the database for a first group of records associated with the first index attribute, search the database for a second group of records, each record in the second group of records sharing a common second index attribute with a record in the first group of records, but not associated with the first index attribute, and calculate a statistic in response to information associated with the first group of records and the second group of records.