. Author manuscript; available in PMC: 2011 Oct 17.

Published in final edited form as: J Pediatr. 2007 Mar;150(3):286–290.e1. doi: 10.1016/j.jpeds.2006.12.005

Table III.

Regression analyses of speed of sound at the radius and tibia

Models/predictors	Δ SOS radius (m/s) AN vs control	P value	Δ SOS tibia (m/s) AN vs control	P value
AN	97.5 (20.7)	<.0001	91.2 (9.6)	<.0001
AN, adjusted for age	69.3 (18.5)	.0003	72.3 (17.9)	<.0001
AN, adjusted for race	85.7 (29.7)	.005	109.7 (26.7)	<.0001
AN, white subjects only	94.7 (28.7)	.002	119.4 (25.2)	<.0001
AN, adjusted for BMI, race, age	63.9 (29.9)	.03	53.1 (28)	.059
Univariate analyses
Age (years)	22.7 (2.9)	<.0001	16.1 (2.8)	<.0001
Weight (kg)	−0.8 (1)	.41	−3.0 (0.9)	.001
Height (cm)	3.4 (1.5)	.02	2.8 (1.3)	.04
BMI (kg/m²)	−5.79 (2.7)	.06	−10.6 (2.3)	<.0001
White	70.8 (19.2)	.004	47.7 (17.7)	.01
Family history of osteoporosis	43.7 (24.4)	.08	15.5 (22.8)	.51

SOS, Speed of sound; AN, anorexia nervosa status (yes/no); BMI, body mass index.

Data are presented as parameter estimate (β), standard error in parentheses, and indicate the change in SOS (m/s) per unit change of the covariate.