Relationship of bone mineral density and axis length of femoral neck with hip fracture in the aged

Objective To investigate the relationship between bone mineral density (BMD) and the femoral neck axis length (FNAL) with the hip fractures. Methods One hunderd and six patients with femoral neck fracture and another 110 age matched volunteers were selected to measure bone mineral density and axis length of the femoral neck by dual energy X-ray absorptiometry, they included 70 women aged from 60 to 83(averaged 69±9.0 years), 36 men aged from 60 to 93 (averaged 71±9.3 years). An age matched group included 70 women and 40 men were selected to measure bone mineral density of femoral neck and femoral neck axis length by dual energy X-ray absorptiometry. Results The bone mineral density of fracture neck in the fracture group is significantly lower than age matched group (P 0.01), but there was no difference in FNAL between two groups (P 0.05),the hip fracture rate only correlate with BMD of femoral neck. Conclusion BMD of femoral neck has a close relationship with hip fracture risk, however FNAL appears to have no value for the prediction of hip fracture.