Notes. Column 1: galaxy identification. Column 2: spiral types according to Buta et al. (2015): grand-design (G), multi-armed (M), and flocculent (F). Column 3: quality flag for the spiral fit from Herrera-Endoqui et al. (2015): good=1 and acceptable=2. Column 4: number of logarithmic segments fitted by Herrera-Endoqui et al. (2015). Column 5: mean pitch angle (|ϕ|_mean) and standard deviation of the mean, computed from all the fitted logarithmic segments. Column 6: standard deviation of the pitch angle of the different spiral segments (σ_|ϕ|). Column 7: median pitch angle (|ϕ|_median) (errors in the median pitch angle are not provided, since bootstrap resamplings are not appropriate for this work, given the small number of spiral segments per galaxy). Column 8: mean pitch angle of innermost spiral segments (|ϕ|_inner) and standard deviation of the mean. Column 9: mean pitch angle weighted by the arc length of the logarithmic segments (|ϕ|_weighted) and weighted standard deviation (in parenthesis) (the weighted standard deviation is computed as , using the same notation as in Eqs. (2) and (3)). Column 10: mean gravitational torque of the spiral arms (), followed by the uncertainty associated with the disc thickness determination (for details, see Díaz-García et al. 2016a), and the internal dispersion (σ) computed from the maximum values of Q_T associated to the different spiral segments (when ≥0.01, in parenthesis). Column 11: mean gravitational torque of the spiral arms corrected for the dark matter halo dilution (), and internal dispersion of the maximum of associated to the different spiral segments (when ≥0.01, in parenthesis). Column 12: mean m = 2 Fourier amplitude of the spiral arms (), and internal dispersion of the maximum of A₂ associated to the different spiral segments (when ≥0.01, in parenthesis).