AGN-uncorrected q_IR evolution as a function of redshift (x-axis) and M_⋆ (colour bar). Errors on q_IR represent the 1σ scatter around the median value, estimated via bootstrapping over L_IR and L_1.4 GHz. For comparison, other IRRC trends with redshift are taken from the literature (black lines): Bell (2003, dotted); Magnelli et al. (2015, dashed); Delhaize et al. (2017, dot-dashed). Our q_IR values still include the contribution of radio AGN. See Sect. 4.1 for details.