Network design in the diabetes example. The nodes are placed on the circumcircle and are labeled according to the treatments. The edges display the observed treatment comparisons. The thickness of the edges is proportional to the inverse standard error of the treatment effects, aggregated over all studies including the two respective treatments. The network includes 25 two-armed studies on fourteen different designs and one three-armed study of design plac:acar:metf.
Krahn et al. BMC Medical Research Methodology 2013 13:35 doi:10.1186/1471-2288-13-35