Fig. 2

Animal bodyweights regressed against knee compartment volumes. Data are presented from both knees from each animal, where available. The regression equation from a simple linear model of volume versus bodyweight is given in each panel header, along with the p-value for the gradient. The lighter shaded region shows the 95% prediction interval for this model, illustrating the range of plausible future values under this model; the darker shaded region shows the 95% confidence interval for the regression line