Correlations, ρ, of running regression onto (a) final mortality, (b) hockburn and (c) expert gait score. The solid horizontal lines represent the p = 0.05, p = 0.01 boundaries, and each subplot shows the data (dots) along with best-fit regression (solid thick curve) and associated standard posterior uncertainty (thin curves and dashed curves, respectively). We note the improved prediction performance of hockburn and gait score.