Comparison of median open cluster ages with those of Cantat-Gaudin et al. (2020). The colour-coding corresponds to the age dispersion obtained within the cluster, and the size of the points is proportional to the number of cluster members that made our selection. A minimum of three stars per cluster is imposed. The dashed diagonal line represents the 1:1 relation, whereas the dotted lines show deviations from identity of ±50 per cent.