Spontaneous Osteonecrosis of the Knee: A Retrospective Analysis by Using MRI and DEXA

Table 2: Comparisons of bone mineral density and lesion areas in MRI in the operation and conservative treatment groups.

	Healthy side (n=10)	Affected side (n=10)	p-value
Operation	0.933	0.593	0.045^a
DXA of Femur (g/cm²) Conservative	0.890	0.590	0.042^a
Operation	0.782	0.689	0.720^a
DXA of Tibia
(g/cm²) Conservative	0.579	0.501	0.602^a
	Conservative group (n=10)	Operation group (n=10)	p-value
Low	31.1±0.9	175.1±1.1	0.041^a
MRI(Coronal, mm²)
High	7.2±1.1	47.7±0.9	0.049^a
Low	18.3±0.9	65.3±2.1	0.048^a
MRI(Saggital, mm²)
High	4.0±1.1	20.0±0.9	0.035^a

^a Student's t-test.