Table 4.

The comparison of total and trabecular bone volumes and the ratio of trabecular volume versus total volume for the lumbar vertebrae of the control and heparinized rats.

	Heparin	Control	P value (t-test)
Total Volume (mm3 ± StDev)	21.63 ± 2.22	27.74 ± 2.39	0.001
Trabecular Volume (mm3 ± StDev)	9.71 ± 0.67	15.96 ± 0.91	< 0.001
TrabV/TotV Ratio (% ± StDev)	45 ± 2.5	57.9 ± 6.2	0.002

Heparinized group demonstrated significantly low total and trabecular bone volumes. Note that trabecular to total volume ratio for heparinized rats is also significantly low compared to control animals.