Table 3.

Bone Geometry at the Proximal Femoral Shaft at Baseline (Age 17) and Final (Adjusted for Baseline Values) for Stable Weight and Weight Gain Groups

	Baseline—age 17		Change (% change)
	Stable weight (n = 48)	Weight gain (n = 23)	Stable weight (n = 48)	Weight gain (n = 23)
BMD (g)	1.33 (0.137)	1.41 (0.115)*	0.012 (0.060) 1.0%	0.049 (0.066) 3.5%
Cort. Th. (cm)	0.505 (0.068)	0.537 (0.061)	0.005 (0.030) 1.1%	0.025 (0.037)* 4.8%
Outer diameter (cm)	2.60 (0.165)	2.67 (0.130)	0.029 (0.036) 1.1%	0.003 (0.068)* 0.2%
CSA (cm2)	3.31 (0.427)	3.59 (0.363)*	0.065 (0.160) 2.1%	0.126 (0.170) 3.6%
Endocortical diameter (cm)	1.60 (0.179)	1.59 (0.218)	0.020 (0.069) 1.2%	−0.048 (0.118)* −2.8%
Section modulus (cm3)	1.56 (0.281)	1.71 (0.231)*	0.048 (0.075) 3.4%	0.055 (0.104) 3.5%
Strength index (Z/height)	0.094 (0.014)	0.102 (0.013)*	0.002 (0.004) 2.8%	0.003 (0.006) 3.2%
Strength index/weight	0.166 (0.018)	0.166 (0.021)	0.003 (0.011) 1.9%	−0.014 (0.012)* −8.2%
Strength index/lean	0.238 (0.023)	0.239 (0.032)	ns	ns

Values are mean (SD).

Change values are change from baseline (age 17) to final (age 21 + 22 average).

* p < 0.05 for differences between group.

ns, not significant.