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. Author manuscript; available in PMC: 2019 Aug 1.
Published in final edited form as: Gastroenterology. 2018 Apr 13;155(2):469–478.e1. doi: 10.1053/j.gastro.2018.04.013

Figure 1. Determination of Pediatric and Adult Acute and Chronic Pancreatitis Cohorts.

Figure 1

Outpatient and inpatient encounters from 2007–2014 were used from the Truven Health MarketScan Commercial Databases. Using both databases resulted in a total of 141,017,841 unique patients. Patients with AP or CP were identified by their respective ICD-9 diagnosis codes. A subset of patients had dual AP and CP codes on the same day. These represented 0.4% of the pancreatitis cohort and were excluded. These cohorts were further divided into pediatric or adult groups based on age at time of diagnosis.