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Article Abstract
Objective: To investigate whether age influence the precision of dual X-ray absorptiometry (DXA) measurement at the hip in middle-aged and elderly women.
Methods: Totally 90 women were randomly selected and divided into three age groups: 45-55 years, 56-65 years, and 66-75 years. Each age group contained 30 women. Each woman was scanned twice at the same day. Bone mineral density (BMD) values of femoral neck, ward's triangle, and trochanter were collected and grouped by calculating the root mean square (RMS). Precision errors were expressed as RMS (standard deviation, SD).
Results: For the femoral neck and trochanter, significant differences of SD of BMD existed among all age groups. For the ward's triangle, significant difference of BMD existed among all age groups except between the 45-55 group and 56-65 age group.
Conclusion: Age can influence the precision of DXA measurement at the hip in middle-aged and elderly women.
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