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Table 2 Overview of the data sets used in the validation

From: Development and validation of MIX: comprehensive free software for meta-analysis of causal research data

# Author(s) Date Studies Input type
1 Lau et al. [4] 1992 33 DD – large
2 Hodnett et al. [29] 2001 5 DD – small
3 Teo et al. [30] 1991 16 DD – publication bias
4 Crowley [31] 2000 17 DD – rare events
5 Lightowler et al. [32] 2003 5 DC – small
6 Wahlbeck et al. [33] 2000 11 DC – medium large
7 Pagliaro et al. [34] 1992 19 C – odds ratio
8 Law et al. [35] 1994 10 C – risk difference
  1. The validation was done with eight data sets from meta-analysis that have been published in major peer-reviewed journals. The data sets were selected to represent a wide spectrum of potential input for meta-analysis. Abbreviations: "DD" = descriptive data for dichotomous outcomes (two-by-two table data), "DC" = descriptive data for continuous outcomes (means with their standard deviations and sample sizes), and "C" = comparative data (association measures with standards error or confidence intervals).