Table 1.

BMD and Z scores in AIS patients

Lumbar spine BMD (g/cm2)	0.9 +/−0.1
Lumbar spine Z scores (±SD)	−1.2 +/−1.1
Right femoral neck BMD (g/cm2)	0.8 +/−0.1
Right femoral neck Z score (±SD)	−0.8 +/−0.9
Right proximal femur BMD (g/cm2)	0.8 +/−0.1
Right proximal femur Z score (±SD)	−0.8 +/−0.9
Left femoral neck BMD (g/cm2)	0.7 +/−0.1
Left femoral neck Z score (±SD)	−0.8 +/−0.9
Left proximal femur BMD (g/cm2)	0.8 +/−0.1
Left proximal femur Z score (±SD)	−0.9 +/−0.8
The lowest femur Z score (±SD)	−1.2 +/−0.9

BMD = bone mineral density.

Z score = difference from normal mean expressed as standard deviation.

AIS = adolescent idiopathic scoliosis.