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J Thorac Cardiovasc Surg 2008;135:713-714
© 2008 The American Association for Thoracic Surgery

Letter to the Editor

The role of propensity scores should be discouraged when there is too little and too early of new surgical techniques

Department of Surgery, Loyola University Stritch School of Medicine, Chicago, Ill

The first 20% of the full text of this article appears below.

To the Editor:

Propensity scores in medical application have an important role in balancing the confounder effect of recruited variables and help in delivering a sound message. In an editorial written by Donald Rubin (developed propensity scores) entitled "On principles for modeling propensity scores in medical research,"¹ the author emphasized 3 aspects of this work: (1) that diagnostics for the successful design of observational studies should be based on estimated propensity scores by using logistic regression; (2) observational studies should be designed in analogy with the way randomized experiments are designed; and (3) distributional . . . [Full Text of this Article]

Related Article

Reply to the Editor

Hiroyuki Kamiya, Klaus Kallenbach, Axel Haverich, and Matthias Karck
J. Thorac. Cardiovasc. Surg. 2008 135: 714. [Extract] [Full Text] [PDF]