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Table 3. Correlation of serum GH and IGF-I with proximal tibia BMD and measures of somatic growth in orchidectomized male rats^* ${dagger}$

Comparison	Serum IGF-I	${Delta}$ Body Weight	Tibia Length	Proximal Tibia BMD

Serum GH ${ddagger}$	-0.380^0.015	-0.480^0.002	-0.408^0.008	0.523^0.001
Serum IGF-I	...	0.754^0.001	0.503^0.001	-0.618^0.001

*The Pearson correlation coefficient (r) was calculated using individual data sets from all orchidectomized rats (n = 41). Superscripts indicate the P value for each correlation
${dagger}$ BMD indicates bone mineral density; GH, growth hormone; and IGF-I, insulin-like growth factor I
${ddagger}$ Serum GH values were log transformed to achieve a normal (Gaussian) distribution