Table 2.

Cortical Bone Morphology at the Mid-diaphysis and Trabecular Bone Morphology and Density at the Proximal Tibial Metaphysis (Mean ± SD)

		7 Months		22 Months
Site	Outcome	Control (n = 31–34)	Loaded (n = 32)	Control (n = 28–30)	Loaded (n = 28–29)
Cortical	Med.Ar (mm2)	0.391 ± 0.056	0.405 ± 0.054	0.517b ± 0.065	0.492b ± 0.101
	B.Ar (mm2)	0.723 ± 0.068	0.762a ± 0.055	0.590b ± 0.070	0.631a,b ± 0.057
	Ct.Wi (mm)	0.196 ± 0.012	0.201 ± 0.016	0.151b ± 0.016	0.161a,b ± 0.013
Trabecular	BV/TV (mm3/mm3)	0.132 ± 0.032	0.098a ± 0.018	0.061b ± 0.019	0.067b ± 0.023
	Tb.N (1/mm)	4.9 ± 0.3	4.8 ± 0.3	4.6b ± 0.5	4.5b ± 0.4
	Tb.Th (mm)	0.062 ± 0.005	0.059a ± 0.005	0.056b ± 0.006	0.060a ± 0.006
	vBMD (mg HA/cm3)	230 ± 23	210a ± 16	147b ± 26	149b ± 24

Note: Force groups are pooled because there is no effect of force level (p > .05 by two-way ANOVA).

^aLoaded (right) different from control (nonloaded, left); p < .05, paired t test.

^bTwenty-two-month-old group different from 7-month-old group; p < .05, ANOVA.