Flaring index β (top) and scale height H₁₀₀ (bottom) as a function of SpT. We found that β decreases clearly from early-type BDs to late-type BDs (top), while H₁₀₀ appears independent of the spectral type in the BD regime. The inserted diagrams in each panel show the histograms of these two parameters calculated for targets that belong to the ETBD and LTBD groups, respectively. The vertical dashed lines symbolize the criterion (i.e., M8) used to divide the targets, see Sect. 2. Blue dots represent objects located in clusters with ages < 5 Myr, whereas the red dots refer to older (≳ 5 Myr) targets. The blue square in the upper panel points to the obvious outlier target (OTS 44) of the observed relation. For better representation, slight changes in either the SpT or disk parameters are made for objects with a pair of identical values.