Weighted mixed-effects dose-response models for tables of correlated contrasts

Recognizing a dose{response pattern based on heterogeneous tables of contrasts is hard. Specication of a statistical model that can consider the possible dose{response data-generating mechanism, including its variation across studies, is crucial for statistical inference. The aim of this article is to increase the understanding of mixed-effects dose{response models suitable for tables of correlated estimates. One can use the command drmeta with additive (mean difference) and multiplicative (odds ratios, hazard ratios) measures of association. The postestimation command drmeta graph greatly facilitates the visualization of predicted average and study-specific dose{response relationships. I illustrate applications of the drmeta command with regression splines in experimental and observational data based on nonlinear and random-effects data-generation mechanisms that can be encountered in health-related sciences.