Int J Health Geogr - A linear programming model for preserving privacy when disclosing patient spatial information for secondary purposes.

Tópicos

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Resumo

CKGROUND: A linear programming (LP) model was proposed to create de-identified data sets that maximally include spatial detail (e.g., geocodes such as ZIP or postal codes, census blocks, and locations on maps) while complying with the HIPAA Privacy Rule's Expert Determination method, i.e., ensuring that the risk of re-identification is very small. The LP model determines the transition probability from an original location of a patient to a new randomized location. However, it has a limitation for the cases of areas with a small population (e.g., median of 10 people in a ZIP code).METHODS: We extend the previous LP model to accommodate the cases of a smaller population in some locations, while creating de-identified patient spatial data sets which ensure the risk of re-identification is very small.RESULTS: Our LP model was applied to a data set of 11,740 postal codes in the City of Ottawa, Canada. On this data set we demonstrated the limitations of the previous LP model, in that it produces improbable results, and showed how our extensions to deal with small areas allows the de-identification of the whole data set.CONCLUSIONS: The LP model described in this study can be used to de-identify geospatial information for areas with small populations with minimal distortion to postal codes. Our LP model can be extended to include other information, such as age and gender.

Resumo Limpo

ckground linear program lp model propos creat deidentifi data set maxim includ spatial detail eg geocod zip postal code census block locat map compli hipaa privaci rule expert determin method ie ensur risk reidentif small lp model determin transit probabl origin locat patient new random locat howev limit case area small popul eg median peopl zip codemethod extend previous lp model accommod case smaller popul locat creat deidentifi patient spatial data set ensur risk reidentif smallresult lp model appli data set postal code citi ottawa canada data set demonstr limit previous lp model produc improb result show extens deal small area allow deidentif whole data setconclus lp model describ studi can use deidentifi geospati inform area small popul minim distort postal code lp model can extend includ inform age gender

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