Reliability of Acute Pancreatitis Diagnosis Coding in a National Patient Register: A Validation Study in Sweden

Study design biases in pancreatic inflammatory diseases

“…This is in agreement with Ammann et al 3 who found a mean interval of 5.5 years to progression to chronic pancreatitis, although more recently Lankisch et al have suggested that progression can occur over an even longer time-frame of a decade 4. Finally, in a recent retrospective report of the Swedish National Patient Registry,5 coding was found to be highly accurate for the diagnosis of acute pancreatitis, but there were a significant number of patients with chronic pancreatitis who were coded as having acute pancreatitis.…”

Postmenopausal hormone replacement therapy and risk of acute pancreatitis: a prospective cohort study

“…Third, the cases were identified by register diagnosis, which may not have been entirely correct. However, the Swedish National Patient Register has been shown to be highly accurate for the diagnosis of acute pancreatitis, 19 and this accuracy should not differ by use of hormone replacement therapy. To minimize misclassification with other exocrine pancreatic diseases, we used such diseases (including cancer) as censoring events.…”

Validation of Obesity Surgery Data in the Swedish National Patient Registry and Scandinavian Obesity Registry (SOReg)

“…Population-based health registers in Sweden are commonly used for research purposes, and validation of these data sources are of importance to ensure research of high reliability and validity [5]. The Swedish National Patient Register (NPR) has been validated for some diagnoses [6,7] and surgical procedures, amongst others esophageal cancer surgery [8] and gynecological operations [9]. However, there has been no prior validation of codes representing obesity surgery in the NPR.…”