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http://hdl.handle.net/1942/397
Title: | Testing for bias in weighted estimating equations | Authors: | Lipsitz, Stuart Parzen, Michael MOLENBERGHS, Geert IBRAHIM, Joseph |
Issue Date: | 2001 | Publisher: | OXFORD UNIV PRESS | Source: | Biostatistics, 2(3). p. 295-307 | Abstract: | It is very common in regression analysis to encounter incompletely observed covariate information. A recent approach to analyse such data is weighted estimating equations (Robins, J. M., Rotnitzky, A. and Zhao, L. P. (1994), JASA, 89, 846-866, and Zhao, L. P., Lipsitz, S. R. and Lew, D. (1996), Biometrics, 52, 1165-1182). With weighted estimating equations, the contribution to the estimating equation from a complete observation is weighted by the inverse of the probability of being observed. We propose a test statistic to assess if the weighted estimating equations produce biased estimates. Our test statistic is similar to the test statistic proposed by DuMouchel and Duncan (1983) for weighted least squares estimates for sample survey data. The method is illustrated using data from a randomized clinical trial on chemotherapy for multiple myeloma | Keywords: | estimating equations; generalized linear model; missing at random; missing covariate data | Document URI: | http://hdl.handle.net/1942/397 | ISSN: | 1465-4644 | e-ISSN: | 1468-4357 | DOI: | 10.1093/biostatistics/2.3.295 | Rights: | Copyright Oxford University Press 2001 | Category: | A1 | Type: | Journal Contribution |
Appears in Collections: | Research publications |
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