Table 2.

Correlation between bone mineral density (BMD; g/cm²) and selected characteristics.

Characteristic	Bone Mineral Density
	Lumbar Spine		Total Hip
	rho	p	rho	p
Age, yrs	−0.48	< 0.001	–0.44	< 0.001
Body mass index, kg/m²	0.17	0.05	0.33	< 0.001
Years since menopause	−0.47	< 0.001	–0.40	< 0.001*
Duration of RA, yrs	−0.12	0.10	0.19	0.03*
Global functional status (range I–IV)	−0.06	0.40	−0.21	0.01*
HAQ-DI score (range 0–3)	0.00	0.9	−0.12	0.10
Joint tenderness count (range 0–28)	0.12	0.10	0.01	0.80
Joint swelling count (range 0–28)	0.17	0.05*	0.01	0.80
Prednisone, mg/day	−0.06	0.40	−0.17	0.05
Rheumatoid factor, IU/ml	−0.10	0.30	0.23	0.02*
C-reactive protein, mg/l	0.13	0.20	0.04	0.70
Erythrocyte sedimentation rate, mm/h	0.24	0.01*	0.21	0.01*
Serum leptin, ng/ml	0.17*	0.04*	0.21*	0.01*