. Author manuscript; available in PMC: 2012 Feb 1.

Published in final edited form as: Osteoarthritis Cartilage. 2010 Nov 26;19(2):171–179. doi: 10.1016/j.joca.2010.11.009

Table 4.

Univariate and multivariate mixed effects regression of glycosaminoglycan content as a percentage of wet weight (sGAG) with T2 relaxation time and age for all data points. The regression coefficients are given; the p-value for each regression coefficient is given in the footnote. Regression R² was calculated by squaring the linear correlation between model predictions and observed values.

Table 4. Regression Coefficients on sGAG for All Specimens
Samples (N)	Univariate sGAG analysis				Multivariate sGAG analysis
Samples (N)	Age	R²	T2	R²	Age	T2	R²
Bottom region (93)	−0.02^***	0.39	−0.00^#	-	−0.02^***	0.00^#	0.39
Top region (95)	−0.03^***	0.64	0.00^#	-	−0.03^***	0.00^#	0.64
Full thickness (90)	−0.02^***	0.59	0.00^#	-	−0.02^***	−0.00^#	0.59
Top & Bottom (188)	−0.03^***	0.37	−0.04^***	0.44	−0.03^**	−0.03^***	0.43

p<0.60

^**

p<0.01

^***

p<0.001