Table 5.

Gender-specific differences in hip structural geometry with age. For simplicity, data are shown only for differences (%) between the oldest (≥ 85 y) and youngest (72–74 y) age groups, referent to the youngest. In Model 1 data were adjusted for age, height, and weight. Model 2 included adjustments of Model 1, as well as adjustment for femoral neck BMD measured by the Lunar densitometer. Model 3 included adjustments of Model 1, as well as adjustment for BMD measured by HSA at the corresponding region. In all models, dimensionless Buckling Ratio was not adjusted for height and weight.

	Women			Men
	≥ 85 y vs. 72–74 y (% difference)			≥ 85 y vs. 72–74 y (% difference)
	Model 1	Model 2	Model 3	Model 1	Model 2	Model 3
Narrow Neck
Cross Sectional Area	−9.6***	−1.7	+2.5	−4.9	+0.4	+3.2*
Outer Diameter	+6.3****	+4.6***	+3.1*	+5.00**	+4.4**	+3.7**
Cortical Thickness	−15.4****	−6.5**	+0.0	−9.9*	−4.0	−0.1
Section Modulus	−8.0*	−1.8	+5.9*	−0.4	+4.3	+7.5**
Buckling Ratio	+33.7****	+9.9*	+0.8	+22.3****	+8.0*	+2.6
Intertrochanteric
Cross Sectional Area	−7.0*	+1.4	+0.6	+0.5	+5.0*	+2.8
Outer Diameter	+1.1	+0.9	+0.9	+2.9	+2.6	+2.7
Cortical Thickness	−11.2*	−2.4	−2.8*	−1.6	+4.7	+1.4
Section Modulus	−2.1	+5.1	+5.0*	+4.6	+8.3*	+6.6*
Buckling Ratio	+24.8****	+3.3	+3.5	+8.3	−6.8	−6.1

^*P < 0.05

^**P < 0.01

^***P < 0.001

^****P < 0.0001