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Previous Volume 342:1448-1449 May 11, 2000 Number 19 Next

	Since this article has no abstract, we have provided an extract of the first 100 words of the full text and any section headings.

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To the Editor: Given the strong relation between the volume of procedures and outcomes in interventional cardiology, the results reported by Rankin et al. (Dec. 23 issue)¹ may not completely reflect current population outcomes.^2,3 The use of a hierarchical model might have permitted a simultaneous investigation of the role of the individual operators.

Also, even the study's relatively large sample of 9594 procedures may have been inadequate to identify small, but clinically meaningful, risks or benefits. For example, although the authors are reassured by their finding that there was not a statistically significant increase in the unadjusted rate of myocardial . . . [Full Text of this Article]

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