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. Author manuscript; available in PMC: 2015 May 1.
Published in final edited form as: Pharmacoepidemiol Drug Saf. 2014 Feb 18;23(5):515–525. doi: 10.1002/pds.3595

Figure 1.

Figure 1

Study population selection from the United States Renal Data System. We selected a cohort of patients 67 years of age or older whose primary payer was Medicare who underwent hemodialysis with heparin at a participating facility on April 9 or 10, 2008. HD=hemodialysis.