Fig. 8. The percentage of trabecular bone mineral densities (tBMD) of HAC dogs compared with those of normal dogs. Linear regression equations obtained from scatter plots of normal BMDs were used to see if BMDs of HAC dogs were actually lower than those of normal dogs at the same ages, assuming normal values are 100%. The predicted age-adjusted tBMDs of PDH and ADH dogs were approximately 20% and 40% less than those of normal patients at each vertebra, respectively.