Notes. Columns 2–3 are the range and median outflow properties measured here from the near-infrared hydrogen recombination lines (Hion). Columns 4–7 are the values reported by Bessiere et al. (2024) for the same six QSO2s and for the whole sample of 48 QSO2s. The authors used [OIII] measurements from SDSS data, adopted a non-parametric approach and TR-based electron densities, and assumed an outflow extent of r_out = 0.62 kpc. Columns 8–9 are the values reported for 18 QSO2s at z = 0.3–0.41 by Hervella Seoane et al. (2023), using [OIII] from Gemini/GMOS-S data, adopting a parametric approach, and assuming r_out = 1 kpc. Since they assumed ${\mathrm{n}}_{\mathrm{e}}=200{\mathrm{cm}}^{-3}$, here we recalculated their outflow properties using the median TR-based electron density of the QSOFEED sample (${\mathrm{n}}_{\mathrm{e}}\sim 2570{\mathrm{cm}}^{-3}$; Bessiere et al. 2024). Columns 10–11 are the values reported for four QSO2s at z = 2.0–3.5 from Bertola et al. (2025) and Perna et al. (2025), observed with JWST NIRSpec. In Bertola et al. (2025) the Hα outflow properties were derived from parametric fits, using an outflow extent of r_out ∼ 1 kpc, v_out = max(v₁₀, v₉₀), and assuming n_e = 1000 cm⁻³. In Perna et al. (2025) they used a parametric fit of the Hβ line, assumed r_out ∼ 3 kpc, ${\mathrm{n}}_{\mathrm{e}}=1000{\mathrm{cm}}^{-3}$, and ${\mathrm{v}}_{\mathrm{out}}=1000{\mathrm{km}\mathrm{s}}^{-1}$. Here we recomputed their outflow properties assuming ${\mathrm{n}}_{\mathrm{e}}\sim 2570{\mathrm{cm}}^{-3}$ (Bessiere et al. 2024) and v_out = v_s. Bertola et al. (2025) defined the outflow velocity as v_out = max(v₁₀, v₉₀), with v_max ∼ 1.2 × max(v₁₀, v₉₀). To infer v_s, we assumed that v_s ∼ 0.1 × v_max (Hervella Seoane et al. 2023).