Equivalent widths of the 5780 and 5797 DIBs correlated with column densities of H₂ (top panels) and HI (bottom). Closer relations are emphasized with the fitted straight lines. 5797 DIB correlates better with N(H₂), while 5780 DIB with N(HI) (correlation coefficients equal to 0.75 and 0.74, respectively). Uncertain column density of HI in the case of HD 152236 was not used in calculations.