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American Journal of Epidemiology Advance Access originally published online on May 25, 2007
American Journal of Epidemiology 2007 166(2):238-239; doi:10.1093/aje/kwm164
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American Journal of Epidemiology © The Author 2007. Published by the Johns Hopkins Bloomberg School of Public Health. All rights reserved. For permissions, please e-mail: journals.permissions@oxfordjournals.org.

LETTERS TO THE EDITOR

RE: "VARIABLE SELECTION FOR PROPENSITY SCORE MODELS"

Ian Shrier1, Robert W. Platt2 and Russell J. Steele3

1 Centre for Clinical Epidemiology and Community Studies, Sir Mortimer B. Davis-Jewish General Hospital, McGill University, Montreal, QC H3T 1E2, Canada
2 Department of Epidemiology, Biostatistics, and Occupational Health, McGill University, Montreal, QC H3A 1A2, Canada
3 Department of Mathematics and Statistics, McGill University, Montreal, QC H3A 2K6, Canada

(e-mail: ian.shrier@mcgill.ca)

The first 10% of the full text of this article appears below.

We recently read the paper by Brookhart et al. (1) on different propensity score (PS) models. We would like to comment on the conclusion that "... standard model-building tools designed to create good predictive models of the exposure will not always lead to optimal PS models, particularly in small studies" (1, p. 1149).

Conceptually, the objective underlying the PS method is to transform data from . . . [Full Text of this Article]


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