MOESM1 of Validating surgical procedure codes for inflammatory bowel disease in the Swedish National Patient Register

Abstract

Additional file 1: Table S1. IBD-related surgical procedure codes included in the review process with frequency of validated codes; 2) Table S2. Classification and definitions of coding errors in the NPR with frequency Table S1 includes all surgical procedure codes included in the review process with frequency of validated codes. Table S2 shows the classification and definitions of coding errors used in the validation process together with frequency of identified errors