BACKGROUND AND AIM: Swedish health registries are common sources of data for studies on the effects of @entity28 surgery, and there is a need to assess the quality of data in these registries. The aim of this study was to validate the registration of @entity28 surgery in the National @entity1 Registry (NPR) and the Scandinavian Obesity Surgery Registry (SOReg). METHOD: We randomly selected 962 out of 8501 registrations of @entity28 surgery in 2011 from the NPR and SOReg. Registered surgical procedures in the NPR and SOReg were compared to the medical records, and concordance was analyzed by calculating positive predictive value ( @entity2286 ) with 95  % confidence interval (CI). RESULTS: We received 938 (98  %) medical records for manual review. The overall @entity2286 for @entity28 surgery was high in the NPR ( @entity2286 97.0; 95  % CI 95.6-98.4) and even higher in SOReg ( @entity2286 99.7; 95  % CI 99.3-100). Accuracy was higher for gastric bypass surgery than for other types of @entity28 surgery. Registrations that were misclassified as @entity28 surgery (n   =   44) included reoperations due to complications or reconstruction to normal anatomy after previous @entity28 surgery (n   =   11) and endoscopic procedures (n   =   10). CONCLUSION: Obesity surgery registrations in the NPR and SOReg have high accuracy and are reliable sources of data to identify @entity1 having undergone @entity28 surgery. When it is of importance to distinguish between specific surgical procedures, non-gastric bypass surgeries in the NPR should ideally be supplemented with data from other sources.

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

@entity1 :: ('9606', 'Species') :: ['patients', 'Patient'] @entity2286 :: ('12211', 'Species') :: ['PPV'] @entity28 :: ('MESH:D009765', 'Disease') :: ['obesity']
@entity1 :: (9606,Species) :: ['Patient']
