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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