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ludic is a package which performs probabilistic record linkage methods that relies on the use of diagnosis codes only, in the absence of direct identifiers. On top of the CRAN help files, the following article explains what ludic is about:

Hejblum BP, Weber G, Liao KP, Palmer N, Churchill S, Szolovits P, Murphy S, Kohane I, Cai T (2019). Probabilistic Record Linkage of De-Identified Research Datasets Using Diagnosis Codes. Scientific Data, 6:180298. <doi: 10.1038/sdata.2018.298>.


The easiest way to get ludic is to install it from CRAN:


or alternatively you can get the development version from GitHub:


– Boris Hejblum