ITEM BIAS: MANTEL-HAEHSZEL AND THE RASCH MODEL John M. Linacre and Benjamin D. Wright Memorandum No. 39 MESA Psychometric Laboratory Department of Education University of Chicago February 1987 The Mantel-Haenszel (MH) procedure attempts to identify and quantify differential item performance (item bias). This paper summarizes the MH statistics, and identifies the parameters they estimate . An eq...

61 6 Sham PC, Zhao JH, Waldman I, Curtis D: Should ambiguous trios for the TDT be discarded? Ann Hum Genet 2000;64:575–576. 7 Aidoo M, Terlouw DJ, Kolczak MS, et al: Protective effects of the sickle cell gene against malaria morbidity and mortality. Lancet 2002;359(9314): 1311–1312. 8 Spielman RS, McGinnis RE, Ewens WJ: Transmission test for linkage disequilibrium: the insulin gene region and i...

The Cochran–Mantel–Haenszel (CMH) tests apply when every treatment is present on block or stratum and responses are categorical. This chapter explains the most elementary of incomplete designs, balanced design (BIBD), in part to see how CMH methods can aid analysis for such designs. relationship shows that adjusted Durbin test ANOVA F essentially same test, so both equality mean ranks, not mere...

The logrank test is a well-known nonparametric which often used to compare the survival distributions of two samples including right-censored observations, it also known as Mantel-Haenszel test. Gρ family tests, generalizes by using weights assigned observations. In this paper, we present switch monotonicity property for was motivated need derive bounds statistic in case imprecise data This sta...

Meta-analysis of rare event studies has recently become a subject of controversy and debate. We will argue and demonstrate in this paper that the occurrence of zero events in clinical trials or cohort studies, even if zeros occur in both arms (the case of a double-zero trial), is less problematic, at least from a statistical perspective, if the available statistical tools are applied in the app...

The Mantel-Haenszel estimate for the odds ratio (and its logarithm) in stratified case control studies lacked a generally acceptable variance estimate for many years. The Robins-Breslow-Greenland estimate has met this need, but standard textbooks still do not provide an explanation of how it is derived. This article provides an accessible derivation which demonstrates the link between the Robin...

s | 83 included) and Mantel Haenszel-Risk Ratio of 1.31, 95% CI=1.01 to 1.69 (p=0.04) favouring active treatment over placebo according to response rates (12 studies included). Trials were patients merely had BLT as active treatment indicated a higher effect size (Hedges`s g= -0.51, 95%CI =-0.70 to -0.32 and p=0.001) than studies with concomitant psychopharmacological treatment (Hedges`s g= -0....

The metafor package provides functions for conducting meta-analyses in R. The package includes functions for fitting the meta-analytic fixedand random-effects models and allows for the inclusion of moderators variables (study-level covariates) in these models. Meta-regression analyses with continuous and categorical moderators can be conducted in this way. Functions for the Mantel-Haenszel and ...

Observational studies, including the case-control design frequently used in epidemiology, are subject to a number of biases and possible confounding factors. Failure to adjust with them may lead to an erroneous conclusion about the existence of a causal relationship between exposure and disease. The Cochran-Mantel-Haenszel (CMH) test is widely used to measure the strength of the association bet...

In a recent paper, Hessen (Psychometrika 70(3):497-516, 2005) introduces the class of constant latent odds-ratios models as an extension of the Rasch model for which the sum score is still the sufficient statistic for ability. In this paper the relation between both the general and the general parametric constant latent odds-ratios model and the Rasch model is considered.