Histograms of distance ratios R_S and normalised distance ratios R_S∕σ_S derived from comparison between Gaia parallaxes and statistical distances (using subtrends) from FPB16. Ratios are plottedfor both the higher quality set of parallaxes (see text) and rejected parallaxes for comparison, in dark and light blue respectively. The plot on the left shows the raw distance ratios, with the mean value of 1.03 ± 0.06 for the best quality parallax set. On the right the distance ratios have been re-centred around R_S = 1 and divided by their estimated uncertainties σ_R. Though the distribution of distance ratios is not expected to be Gaussian, a standard normal distribution is over-plotted for comparison. Below is a scatter plot depicting the distance ratios of the best parallax subset against the physical radius derived from the statistical distance. Marker colours and shapes show morphological classifications taken from HASH. Trends in this plot (that is, a correlation between distance ratio and radius) would be indicative of a slope differing from that derived in FPB16. Filled markers have R_S within 2.5σ_S of 1 (dashedline). Outliers are empty markers, with the two outliers specifically mentioned in the text highlighted. The correlation coefficients are 0.18 and 0.08 with and without the outliers respectively. The former is very weakly significant, while the latter is not.