title: Meta-analysis: different methods--different conclusions?
abstract: Different estimation methods for covariance parameters in meta-analyses can result in conflicting p-values concerning the test of treatment effect. We propose a valid method to overcome this problem at least partially by introducing a new estimator for the standard deviation of the common treatment difference.
authors.affiliation: Department of Statistics, University of Dortmund, D-44221 Dortmund, Germany.
authors.forename: A
authors.initials: A
authors.lastname: Böckenhoff
authors.forename: J
authors.initials: J
authors.lastname: Hartung
mesh_terms: D000704:Analysis of Variance; D003627:Data Interpretation, Statistical; D006801:Humans; D008432:Mathematical Computing; D015201:Meta-Analysis as Topic; D015233:Models, Statistical