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A Note on the Covariance of the Mantel-Haenszel Log-Odds Ratio Estimator and the Sample Marginal Rates ANCOVA

Author(s):
Holland, Paul W.
Publication Year:
1989
Report Number:
RR-89-19, PSRTR-89-85
Source:
ETS Research Report
Document Type:
Report
Page Count:
16
Subject/Key Words:
Analysis of Covariance (ANCOVA), Estimation (Mathematics), Mantel Haenszel Technique

Abstract

A simple technique, developed in Phillips (1987) is used to approximate the covariance of the Mantel-Haenszel estimate of the log-odds-ratio (for a 2 x 2 x K table) and the sample marginal proportions. These results are then applied to obtain an approximate variance estimate of an adjusted risk difference based on the Mantel-Haenszel odds-ratio estimator. (16pp.)

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