Pressure terms as function of the age of the youngest cluster in the region (top) and the total mass of clusters younger than 10 Myr (bottom). Red and blue triangles indicate evolved regions hosting a SNR. The black dots and line indicate the median (±quartiles, shaded in grey) in radial bins of 1 Myr (top) and in mass bins with equal number of objects (bottom, ≃40 objects/bin). On the top right, we indicate the value of the Pearson’s correlation coefficient r.