Correlation between the thermal dust continuum fluxes at 1.3 mm and the disk gas masses derived by rescaling disk dust masses. The size of the disk symbol reflects the disk size, and the color of the symbol designates the luminosity of the central star (darker colors correspond to lower luminosities). The coefficient of determination (corresponding to the Pearson coefficient r to the power of two) was calculated by taking the data uncertainties into account and is shown in the top right corner.