Star-formation efficiency of the dense gas (SFE_dense) as a function of the stellar mass surface density (Σ_star) in the SB ring of NGC 1068 at the initial resolution of 56 pc (left panel) and at two averaging scales: 100 pc (middle panel) and 400 pc (right panel). Magenta circles and isodensity contours correspond to data measurements evaluated at the Nyquist-sampled grid of points after convolution with the appropriate Gaussian for each aperture. Black circles show median SFE_dense values, and error bars indicate the rms scatter in the bins. Symbols and isodensity contours in the middle panel identify the data obtained in other galaxies. The dashed orange line represents the fit of Usero et al. (2015). Vertical and horizontal error bars at the lower-right corner of each panel account for the typical uncertainties, which amount to ±0.13 dex and ±0.09 dex, respectively.