. Author manuscript; available in PMC: 2014 Mar 1.

Published in final edited form as: J Bone Miner Res. 2013 Mar;28(3):537–546. doi: 10.1002/jbmr.1802

Table 2.

General linear model analysis of scaling factors for the Aging and Fracture Studies.

Subgroup	Least squares mean scaling factors ± standard deviation
Subgroup	Anteroposterior^a,^b	Inferosuperior^a,^c	Mediolateral^a
Young American	1.0066±0.0369	0.9950±0.0396	1.0005±0.0394
Middle-age American	0.9912±0.0356	0.9754±0.0362	0.9974±0.0389
Older American	0.9718±0.0301	0.9577±0.0339	0.9945±0.0341

Older Icelandic Controls	0.9091±0.0266	0.9309±0.0252	0.9494±0.0214
Older Icelandic Fracture	0.8893±0.0282	0.9104±0.0267	0.9414±0.0234

A smaller scaling factor indicates overall larger proximal femoral size in the given dimension.

American women were adjusted for height and weight.

Older Icelandic women were adjusted for age, height, weight, and aBMD.

Age coefficient was significantly different than zero in the Aging Study (P<0.0001).

Fracture coefficient was significantly different than zero in the Fracture Study (P=0.0261).

Fracture coefficient was significantly different than zero in the Fracture Study (P=0.0483).