Table 2.

Univariate Factors Associated With BMD (g/cm²) Based on Walking Status

	Walkers (n=54)		Wheelchair users (n=95)
Variable	β ± SE	p	β ± SE	p
Age (years)	−0.0023 ± 0.0015	0.12	0.0011 ± 0.0012	0.37
Injury duration (years)	0.00080 ± 0.0014	0.56	−0.0019 ± 0.0015	0.19
Weight (kg)	0.0028 ± 0.0010	0.01	0.0015 ± 0.00084	0.07
Lean mass (kg)	0.0074 ± 0.0021	0.0008	0.0046 ± 0.0020	0.03
Fat mass (kg)	0.0022 ± 0.0017	0.20	0.0013 ± 0.0012	0.29
BMI (kg/m2)	0.0076 ± 0.0034	0.03	0.0049 ± 0.003	0.11
25 OH vitamin D (ng/mL)	−0.00028 ± 0.04	0.85	−0.0013 ± 0.002	0.53
Markers of bone turnover (ng/mL)
C-telopeptide	0.13 ± 0.14	0.36	−0.19 ± 0.076	0.01
Osteocalcin	0.0031 ± 0.0022	0.16	−0.0054 ± 0.0022	0.02
	Mean BMD ± SE	p	mean BMD ± SE	p
25 OH vitamin D		0.99		0.52
Normal (≥20 ng/mL)	0.875 ± 0.027		0.684 ± 0.021
Deficient (<20 ng/mL)	0.875 ± 0.023		0.708 ± 0.029

Bone density was obtained from a repeated measures regression model based on proximal tibia, distal femur, total hip, and femoral neck BMD.

BMD=bone mineral density; BMI=body mass index.