Table 4.

Regression Coefficients, Offsets, and r² Values for Univariate and Multiple Linear Regression Analyses

	Regression coefficients
Model	w1	w2	w3	Offset	r2
I	561.9			−1.6	0.43
II		208.5		4.9	0.51
III			−161.9	160.3	0.46
IV	222.1	150.7		1.2	0.54
V	324.7		−104.5	99.4	0.54
VI		142.4	−66.6	68.0	0.54
VII	217.6	87.1	−65.2	63.0	0.57

Results of regression modeling based on the seven unique linear combinations of component weights. The univariate models were established with w₁, w₂, and w₃ as independent variables. Multiple linear regression was performed with linear combinations of two, or all three, of the available component weights, as indicated. In all cases, measured sGAG was the dependent variable. For all models, regression coefficients are shown below the variables used in that model, along with the offsets and r² as indicated.