Relation between aperture averaged SFE and dense gas measures. Left: Original. Right: Adjusted. Empty symbols show apertures with R_Gal < 8 kpc. Correlations are significant for apertures of R = 0.25 kpc for f_DG vs. SFE (p-value: 0.0004, R-value: 0.5), and for ΔA_V vs. SFE (p-value: 0.01, R-value: 0.3). Thus we obtain correlations for the same apertures with and without the YSO adjustment, but with lower p-values and higher R-values for the adjusted case.