High acquisition rate and internal validity in the Scandinavian Obesity Surgery Registry

The acquisition rate during 2012–2018 was compared with Swedish national databases, while registered data in 89 selected variables (67 mandatory) was compared with medical records of 1860 randomly selected patients from all bariatric centers (n = 39–43) reporting to SOReg. The evaluation was done by 1 independent observer. Completeness of data in the entire registry for the same time period was studied.