Fig. 3From: Improvement in staff behavior during surgical procedures to prevent post-operative complications (ARIBO2): study protocol for a cluster randomised trialDescription of data collected, data sources and key variables for the merging according to levels. OR, operating room; eCRF, electronic case report form; ICD-10, International Statistical Classification of Diseases and Related Health Problems, 10th Revision; POC, post-operative complicationBack to article page