Fig. 2
From: Does asymmetry in patient recruitment in large critical care trials follow the Pareto principle?
Lorenz curves. Lorenz curves and Gini coefficients for the five trials. The grey diagonal line is the line of equality, which represents a scenario where each ICU recruits the same proportion of patients into the trial. Each coloured line is a Lorenz curve for a trial, with greater distance from the line of equality representing greater asymmetry of recruitment. The dashed line is the “80/20” distribution where 80% of the recruitment occurs in the top 20% of sites