Table 4.

Univariate analysis: correlation between HR-pQCT measures and demographic and clinical variables (continuous variables). Results are expressed as correlation coefficient (r).

Variables	Geometry			vBMD						Microarchitecture					Biomechanical Properties
Variables	Total Area	Cortical Area	Trabecular Area	CSA	D100	Dcomp	Dtrab	Dmeta	Dinn	Ct.Th	BV/TV	Tb.N	Tb.Th	Tb.Sp	Stiffness	Estimated Failure Load	Apparent Modulus
Age	−0.12	−0.14	−0.08	−0.16	−0.18	−0.19	−0.28^*	−0.29	−0.68	−0.12	−0.28^*	−0.24^*	−0.2^**	0.26	−0.32^**	−0.31^**	−0.22
Body height	0.46^**	0.17	0.42^**	0.45^**	−0.08	0	0.12	0.12	0.11	−0.03	0.12	0.06	0.1	−0.08	0.18	0.16	−0.11
Body weight	0.32^**	0.33^**	0.24^*	0.26^*	0.06	0.10	0.11	0.09	0.13	0.18	0.12	0.16	0.05	−0.15	0.26^*	0.27^*	0.08
Body mass index	0.1	0.21	0.04	0.06	0.04	0.05	0.03	0.01	0.05	0.15	0.04	0.11	−0.01	−0.09	0.13	0.14	0.07
Disease duration	−0.05	−0.02	−0.06	0.02	0.08	−0.06	0.09	0.13	0.07	0.01	0.1	0.04	0.14	−0.04	0.11	0.09	0.06
SLEDAI	0.24^*	0.06	0.23^*	0.21	−0.04	−0.08	0.18	0.18	0.19	−0.06	0.18	0.22	0.08	−0.22	0.04	0.05	−0.07
SDI	−0.16	−0.32^**	−0.08	−0.05	−0.27^*	−0.30^**	−0.28^**	−0.28^*	−0.28^*	−0.28^**	−0.28^**	−0.25^*	−0.24^*	0.27^*	−0.27^*	−0.28^*	−0.22
25(OH)D	0.11	0	0.1	0.2	−0.06	−0.13	0.01	−0.04	0.03	−0.07	0	0.01	0.01	−0.02	−0.11	−0.05	−0.16
Duration of GC use	0.03	−0.15	0.05	0.08	−0.1	−0.18	0	0.04	−0.02	−0.14	0	0	0.03	0.01	−0.05	−0.06	−0.10
Average GC dose	−0.09	−0.04	−0.07	−0.06	0	0.03	−0.03	−0.05	−0.01	0.02	−0.03	−0.01	−0.04	0.02	−0.09	−0.05	−0.07
Cumulative GC dose	−0.01	−0.17	−0.02	0.07	−0.06	−0.15	0.07	0.09	0.06	−0.11	0.07	0.12	0.05	−0.10	−0.13	−0.11	−0.15

↵* p < 0.05.
↵** p < 0.01; HR-pQCT: high-resolution peripheral quantitative computed tomography; SLEDAI: Systemic Lupus Erythematosus Disase Activity Index; SDI: Systemic Lupus International Collaborating Clinics/American College of Rheumatology Damage Index; GC: glucocorticoid; CSA: cross-sectional area; vBMD: volumetric bone mineral density; D100: average bone density; Dcomp: cortical bone density; Dtrab: trabecular bone density; Dmeta: metatrabecular bone density; Dinn: inner trabecular bone density; Ct.Th: cortical thickness; BV/TV: trabecular bone volume/tissue volume; Tb.N: trabecular number; Tb.Th: trabecular thickness; Tb.Sp: trabecular separation.