Table 3

Correlation coefficients for DXA measured whole body, total hip, and lumbar spine BMC, BMD, and calculated BMAD; QUS measured calcaneal BUA; and QCT measured vTBMD with age, nutritional status (height, weight, and BMI), disease severity (SK score), and lung function (FVC and FEV₁) parameters

	Whole body BMC	Whole body BMD	Total hip BMC	Total hip BMD	L1–L4 BMC	L1–L4 BMD	vTBMD	BUA
Age	0.89^3-160	0.80^3-160	0.82^3-160	0.77^3-160	0.87^3-160	0.81^3-150	0.47^3-150	0.47^3-150
Height	0.94^3-160	0.83^3-160	0.82^3-160	0.77^3-160	0.89^3-160	0.82^3-160	0.39^3-150	0.61^3-160
Weight	0.94^3-160	0.81^3-160	0.90^3-160	0.84^3-160	0.86^3-160	0.90^3-160	0.44^3-150	0.60^3-160
BMI	0.70^3-160	0.53^3-160	0.69^3-160	0.61^3-160	0.66^3-160	0.65^3-160	0.24	0.42^3-150
SK score	−0.24	−0.28	−0.14	−0.18	−0.27	−0.16	−0.50^3-160	0.00
FEV₁	−0.19	−0.27	−0.18	−0.25	−0.25	−0.14	−0.31	−0.02
FVC	−0.08	−0.10	−0.05	−0.10	−0.15	−0.03	−0.18	−0.01

↵3-150 p < 0.05,
↵3-160 p < 0.01.