Correlation between the structure parameter, 𝒬 for the entire and bound populations of cores (dashed and full lines, respectively) versus the surface density of star formation Σ_SFR (top panel) and the correlation between the ratio of the most segregated massive cores to the total number of cores and the Σ_SFR. The horizontal error bars are the 50% uncertainties estimates that are likely to be affecting the measurements of Σ_SFR. The values of 𝒬 = 0.78 and 0.71 are the ones measured by Dib et al. (2018) for the populations of open clusters and young clusters in the Milky Way, respectively. The estimate of Σ_SFR for W43 is made using a different approach than for the other three regions (see text for details). The lines connecting the different sets of points are merely shown to guide the eye.