The comparison of microstructural parameters of region of interest in the femoral head.

BMD, bone mineral density, expressed as mg/cm3; TMD, tissue mineral density, expressed as mg/cm3; BVF, bone volume fraction, bone volume/total volume of bone, expressed as a percent; Tb.N, trabecular number, expressed as 1/mm; Tb.Th, trabecular thickness, expressed as mm; Tb.Sp, trabecular separation, expressed as mm. aStatistical significance was evaluated by independent-samples t test. The comparison of microstructural parameters of region of interest in the femoral head.