title: Privacy-preserving Statistical Query and Processing on Distributed OpenEHR Data.
abstract: Reuse of data from EHRs is essential for many purposes. The objective of the study was to explore how distributed electronic health record (EHR) data can be reused for privacy-preserving statistical query and processing.
  
  
  METHODS
  We have designed and created a proof of concept prototype solution based on the OpenEHR specification to ensure interoperability and to query the EHRs. XMPP was used for communication between the distributed processing components.
  
  
  RESULTS
  We have created a two-phased process where a distributed virtual dataset is first created and thereafter processed using distributed privacy-preserving statistical queries.
  
  
  CONCLUSIONS
  Health authorities in Norway are currently defining the set of archetypes for the national interoperability program. This will create a common information schema enabling reuse of EHR data for statistical query and processing in a privacy-preserving manner. One benefit of the approach is that information transformation between information models for clinical use and statistical processing can be avoided.
authors.affiliation: Department of Computer Science, Faculty of Science and Technology, UiT The Artic University of Norway.
authors.forename: Meskerem Asfaw
authors.initials: MA
authors.lastname: Hailemichael
authors.affiliation: Norwegian Centre for Integrated Care and Telemedicine, University Hospital of North Norway.
authors.forename: Luis
authors.initials: L
authors.lastname: Marco-Ruiz
authors.affiliation: Norwegian Centre for Integrated Care and Telemedicine, University Hospital of North Norway.
authors.forename: Johan Gustav
authors.initials: JG
authors.lastname: Bellika
mesh_terms: D016494:Computer Security; D003219:Confidentiality; D003627:Data Interpretation, Statistical; D057225:Data Mining / Q000379:methods*; D057286:Electronic Health Records / Q000706:statistics & numerical data*; D005568:Forms and Records Control / Q000379:methods; D008498:Medical Record Linkage / Q000379:methods*; D009664:Norway