Outflow properties of the analyzed sample. All panels are in function of the outflow SFR surface density, except the top left. Top left: outflow extent (definition described in the text) as a function of the second-component Hα luminosity. Top right: electron density. Middle left: mass outflow rate. Middle right: mass loading factor. Bottom left: ratio between the outflow kinetic power and the total bolometric luminosity. Bottom right: ratio between the momentum outflow rate and the SFR photon momentum. We display the Pearson coefficients for five of the displayed relations, and the best-fit model with a 3σ uncertainty for the panels is shown as a black line with blue shaded regions.