Table 6.

Regression models for calcium content using bone mineral density (DXA) and HR-pQCT parameters at the tibia and radius stratified for sex.

Variable	Exp β	CI	95%	p
Tibia
Women
BT score ≤ − 2.5 SD	1.03	1.00	1.05	< 0.001
Ct.Po z (1)	1.12	1.10	1.13	< 0.001
Ct.vBMD z mg HA/cm3	0.79	0.78	0.81	< 0.001
Men
BT score ≤ − 2.5 SD	0.75	0.73	0.77	< 0.001
Ct.Po z (1)	1.44	1.42	1.46	< 0.001
Ct.vBMD z mg HA/cm3	1.10	1.07	1.13	< 0.001
Radius
Women
BT score ≤ − 2.5 SD	1.20	1.18	1.23	< 0.001
Ct.Po z (1)	1.07	1.07	1.08	< 0.001
Ct.vBMD z mg HA/cm3	1.22	1.20	1.24	< 0.001
Men
BT score ≤ − 2.5 SD	0.73	0.71	0.75	< 0.001
Ct.Po z (1)	1.33	1.30	1.37	< 0.001
Ct.vBMD z mg HA/cm3	0.98	0.88	0.99	0.012

Exp β equation coefficient, CI confidence interval, SD standard deviation, BT score bone T-score, Ct. Po cortical porosity, z z score, Ct.vBMD cortical volumetric density.