Discussion
retinopathy, CKD-stage, albuminuria
RETINOPATHY, EVENTS, COMPLICATIONS
In this study, we have validated variables pertaining to microvascular complications in the NDR against source data in EHRs. We found that the agreement between corresponding NDR and EHR entries was good concerning albuminuria and foot-at-risk grade and very good concerning creatinine and retinopathy status. Since this was a sub study to the SMARTEST study, we also evaluated the agreement between NDR and EHR data regarding fulfilment of microvascular events as preliminarily defined in the SMARTEST study. In this context, the agreement was very good for all events: progression of CKD-stage, albuminuria grade, foot-at-risk grade and retinopathy stage. The completeness of NDR data was adequate, entries based on novel information in EHRs occurring at average more than annually for creatinine, slightly less than annually for albuminuria and foot-at-risk and more than once every three years for retinopathy; all in keeping with Swedish national guidelines.