Linear regression of N_H vs. M_∗ (left) and sSFR (right) in five redshift bins. The regression is performed using the linmix code, which also takes into account the N_H upper limits. The color-coding is the same as in Fig. 4. The gray squares in the left panel show results from Rodighiero et al. (2015) at z ~ 2, obtained from the HR of X-ray stacked images of FIR detected galaxies in the COSMOS field. The orange dashed line is the relation found in Buchner et al. (2017) for a sample of GRB hosts in a wide range of redshifts (see text).