Our estimation of the q_TIR parameter for our galaxies as a function of the redshift. The dashed line reports the q_TIR(z) relation by Delhaize et al. (2017), with the shaded area indicating the intrinsic scatter of the relation. Our galaxies are color-coded for their AGN fraction, measuring the contribution of nuclear activity to the radio luminosity. Galaxies classified as “radio-excess” (i.e., with f_AGN > 0.9) are surrounded by a red square and removed from the sample.