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This is the preliminary program for the 2007 Joint Statistical Meetings in Salt Lake City, Utah.

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Activity Number: 31
Type: Contributed
Date/Time: Sunday, July 29, 2007 : 2:00 PM to 3:50 PM
Sponsor: Section on Statistical Education
Abstract - #309486
Title: Regression Through the Origin: Models and Methods
Author(s): Patrick Johnston*+
Companies: Children's Hospital Boston
Address: Clinical Reseach Program, Boston, MA, 02115,
Keywords: regression through the origin ; generalized linear models ; imputation
Abstract:

Bowel lengths for infants undergoing gastrointestinal surgery are commonly imputed by more readily available lengths for deceased infants of a similar gestational age. For reasons of tissue elasticity, it is reasonable to expect that the latter overestimate the former by a constant factor. Several simple and intuitive methods have been proposed to estimate this proportionality factor, and we relate these estimates to more general model-based estimates. Models we consider are regressions through the origin estimated by maximum likelihood, maximum quasi-likelihood, and least squares. Aspects related to efficiency, robustness, and parameterization are discussed.

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Revised September, 2007