Diversity (D2) in % compared to inconsistency (I2) in % in seven meta-analyses (see Table 1) depicted as open circles. The open circles indicate that D2 is always equal to or larger than I2. 100% heterogeneity is impossible and the upper right point is just to illustrate that D2 nears asymptotically to I2 when heterogeneity nears 100%. Line of unity, D2 = I2 is the dotted blue line.
Wetterslev et al. BMC Medical Research Methodology 2009 9:86 doi:10.1186/1471-2288-9-86