J Thorac Cardiovasc Surg 2003;126:2118-2119
© 2003 The American Association for Thoracic Surgery
Reply to the Editor
Tirone E. David, MD,
Joan Ivanov, PhD,
Susan Armstrong, MSc,
Harry Rakowski, MD
Division of Cardiovascular Surgery, Toronto General Hospital and University of Toronto, Toronto, Ontario, Canada
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Dr Shuhaiber makes some valid points about our study,1 but many of his comments are irrelevant. He ignored the fact that ours was an observational study and did not establish causation but rather an association between functional class and late mortality after mitral valve repair for mitral regurgitation caused by prolapse. The objectives of the study were clearly defined, and in addition to showing the late outcomes of mitral valve repair for floppy valves it also showed associations between certain preoperative variables and late mortality by multivariable analysis with bootstrap validation. Our study was not a prospective randomized trial, and consequently we could not control the variables before the operation as he suggested. This is, of course, a . . . [Full Text of this Article]
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Copyright © 2003 by The American Association for Thoracic Surgery.