Clinical Implications of Hip Flexion in the Measurement of Spinal Bone Mineral Density

Journal of Clinical Densitometry : the Official Journal of the International Society for Clinical Densitometry
Shota IkegamiHiroyuki Kato

Abstract

The aim of this study was to investigate if differences in leg positioning affect spinal bone mineral density (BMD) measurements and the detection of low bone mass. Subjects included 1039 Japanese patients, 878 women and 161 men (mean ages: 67 and 71 years, respectively). Spinal BMD (L1-4) was measured using dual-energy X-ray absorptiometry (DXA) with patients lying in 2 different positions: (1) supine on the scanning table with hips flexed and knees flexed over a 90° support pad (the standard position) and (2) simply supine (the supine position). Predictive indices were calculated for spinal DXA acquired with patients in the supine position. A BMD T-score of -2.5 or lower was set as the threshold for low bone mass. For the standard and the supine positions during scanning in women, BMDs were 0.911 and 0.915 g/cm(2), respectively; in men, they were 1.117  and 1.124 g/cm(2), respectively. The estimated systematic bias in BMD between the positions was 0.42% (95% confidence interval: 0.24, 0.59; p = 0.009). Random errors in the densitometry measurements for the standard and supine positions were 0.66% and 0.84%, respectively. There was no significant difference between the errors (p= 0.164). The likelihood ratios of a positive and...Continue Reading

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Jun 24, 2009·Journal of Clinical Densitometry : the Official Journal of the International Society for Clinical Densitometry·Shota IkegamiHiroyuki Kato
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May 21, 2013·Journal of Clinical Densitometry : the Official Journal of the International Society for Clinical Densitometry·Shota IkegamiHiroyuki Kato

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Citations

Sep 22, 2016·Osteoporosis International : a Journal Established As Result of Cooperation Between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA·M KamimuraA Taguchi
Feb 6, 2017·Bone·Sarah L Morgan, Ginnie L Prater
Apr 21, 2020·Canadian Association of Radiologists Journal = Journal L'Association Canadienne Des Radiologistes·Patrick MartineauWilliam D Leslie
Oct 19, 2021·Experimental and Therapeutic Medicine·Xiaojing SuYang Liu

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