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Table 3 Heterogeneity and inconsistency in the diabetes example

From: A graphical tool for locating inconsistency in network meta-analyses

Q statistic Number of studies Degrees of freedom p value
Q net 96.98 26 27-9=18 <0.001
Q inc 22.53 26 16-9=7 0.002
Q het 74.45 26 27-16=11 <0.001
Q plac:benf het 4.38 2 2-1=1 0.036
Q plac:metf het 42.16 3 3-1=2 <0.001
Q plac:migl het 6.45 3 3-1=2 0.040
Q plac:rosi het 21.27 6 6-1=5 0.001
Q metf:rosi het 0.19 2 2-1=1 0.665
  1. The decomposition of the Q statistics as well as the degrees of freedom of the corresponding chi-squared distributions and the p values are shown. In addition the considered number of studies are displayed. Only one study is observed for the following designs: plac:acar, plac:piog, plac:sita, plac:vild, acar:SUal, metf:piog, metf:SUal, piog:rosi, rosi:SUal, plac:acar:metf. For this reason, the corresponding Q d het statistics are not shown.