Notes. The numbers in the table represent the mean and the median (med) values of the fractions of each galaxy group in the four density categories calculated for the redshift bins of the identified overdensities. The errors on the mean are calculated following the prescription in Gehrels (1986) for statistically small samples, as explained in the text. The galaxy groups are (i) all the galaxies in the input catalog (z_photspec), (ii) the galaxies with spectroscopic redshift from VANDELS (z_specV), (iii) the LAEVs, (iv) the LAEVs with EW(Lyα) > 20 Å, (v), the LAEVs with stellar masses larger than the median value of the LAEV sample (M_*> medM_*), (vi) the LAEVs with sSFRs lower than the median value of the LAEV sample (sSFR < medsSFR). The four density categories are: the field (F), the transition regions (T), the regions with associated density comparable with that of an overdensity (O), the identified structures (M), as explained in the text. The OM group is obtained summing the fractions in the O and M groups. The median values of stellar mass (log(M_*/M_⊙)) and specific star-formation rate (sSFR) are 9.31 and 3.9 × 10⁻⁹ yr⁻¹ respectively. The Lyα equivalent widths span a range of 1–200 Å.