Table III.

Multivariable regression results

Outcome	Predictors	Coefficient	SEM	R2	p
L3 density	GMFCS level III–IV	−3.5	7.0	0.04	0.62
	Height	0.8	0.4	0.07	0.07
	Weight	−0.5	0.5	0.09	0.33
	Male	−1.7	5.3	0.09	0.74
L3 CSA	GMFCS level III–IV	−52.5	22.8	0.26	0.02
	Height	4.6	1.3	0.57	0.001
	Weight	4.8	1.5	0.61	0.002
	Male	86.4	17.3	0.71	<0.001
Tibia density	GMFCS level III–IV	−14.6	7.4	0.19	0.06
	Height	0.6	0.4	0.19	0.22
	Weight	−0.7	0.5	0.25	0.13
	Male	21.3	6.0	0.46	0.001
Tibia CBA	GMFCS III–IV	−24.3	10.0	0.42	0.02
	Height	1.7	0.6	0.73	0.008
	Weight	1.8	0.6	0.78	0.006
	Male	11.9	8.2	0.79	0.16

SEM, standard error of the mean; GMFCS, Gross Motor Function Classification System; CSA, cross-sectional area; CBA, cortical bone area.