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Fig. 1 | BMC Medical Research Methodology

Fig. 1

From: Addressing data privacy in matched studies via virtual pooling

Fig. 1

Models of horizontally and vertically partitioned data as adapted from Karr, et al. (2007). Each row is for one subject, and columns are for covariates. (a) Horizontally partitioned data. Data subjects are partitioned among database owners or nodes. (b) Vertically partitioned data. Covariates are partitioned among nodes

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