Top: outflow mass-loss rate as a function of the star formation rate for the extended sample of galaxies, whose general properties and outflow characteristics are summarised in Tables 3 and 4. Filled and open circles represent unobscured and obscured AGNs respectively, LINERs are plotted as upward triangles and “pure” starburst galaxies as stars (see legend at the top-left corner of the plot). Symbols are colour-coded according to the fraction of bolometric luminosity attributed to the AGN (L_AGN/L_Bol). Outflow rates are derived by assuming, in the outflow, the conservative CO-to-H₂ conversion factor α_{CO(1 − 0)} = 0.8 for all of the sources. The black dashed line represents the 1:1 correlation between SFR and outflow mass-loss rate. Bottom: this plot indicates a positive correlation between the outflow mass loading factor (/SFR) and L_AGN/L_Bol that emerges from the diagram in the top panel. Notes: in the bottom-right of each panel we show an error bar that is representative for the whole sample, which does not take the uncertainty on the CO-to-H₂ conversion factor into account (see text in Sect. 6 for a more detailed explanation), and corresponds to an average error of ±0.3 dex.