Empirical trends between the H I equivalent width (W_H I) and different observational properties (from top to bottom and left to right): intrinsic absolute magnitude at 1500 Å (), UV attenuation (A_UV) at 1500 Å, measured gas-phase metallicity (12 + log(O/H)) and the average H I residual flux (R(H I)). Points are color-coded by their absolute LyC photon escape fraction, (and upper limits values on are indicated inside the color bar for reference). The Izotov et al. (2016a,b, 2018a,b, 2021) and Wang et al. (2019) sources are displayed with diamonds and also considered in the correlations (see text).