TY - JOUR AU - Guddat, Charlotte AU - Grouven, Ulrich AU - Bender, Ralf AU - Skipka, Guido PY - 2012 DA - 2012/07/28 TI - A note on the graphical presentation of prediction intervals in random-effects meta-analyses JO - Systematic Reviews SP - 34 VL - 1 IS - 1 AB - Meta-analysis is used to combine the results of several related studies. Two different models are generally applied: the fixed-effect (FE) and random-effects (RE) models. Although the two approaches estimate different parameters (that is, the true effect versus the expected value of the distribution of true effects) in practice, the graphical presentation of results is the same for both models. This means that in forest plots of RE meta-analyses, no estimate of the between-study variation is usually given graphically, even though it provides important information about the heterogeneity between the study effect sizes. SN - 2046-4053 UR - https://doi.org/10.1186/2046-4053-1-34 DO - 10.1186/2046-4053-1-34 ID - Guddat2012 ER -