An Approach to Reducing Patients’ Laboratory-Result Based Re-identification Risks in Research Datasets Ravi V. Atreya 1 , Joshua C. Smith 1 , Allison B. McCoy 2 , Bradley Malin 1,3 , Randolph A. Miller 1,4,5 1 Department of Biomedical Informatics, Vanderbilt University, Nashville, TN, USA 2 School of Biomedical Informatics, University of Texas Health Science Center at Houston, Houston, TX, USA 3 Department of Electrical Engineering and Computer Science, Vanderbilt University, Nashville, TN, USA 4 Department of Medicine, Vanderbilt University, Nashville, TN, USA 5 School of Nursing, Vanderbilt University, Nashville, TN, USA Corresponding Author: Ravi V. Atreya Eskind Biomedical Library - B003D 2209 Garland Avenue Nashville, TN 37232-8340 ravi.v.atreya@vanderbilt.edu Phone: (615) 936-2882 Fax: (615) 936-5900 Keywords: Privacy, Information Dissemination, Laboratory Marker, Electronic Health Records, Confidentiality/legislation & jurisprudence Word Count: 4,052-35 = 4,017 (not counting figure placeholders); Abstract 250 words