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Cortical and trabecular bone density and structure in anorexia nervosa
Gabriella Milos1, Anja Spindler, Peter Rüegsegger
1Department of Psychiatry, University Hospital of Zurich, Culmannstrasse 8, 8091 Zurich, Switzerland. gabriella.milos@psy.usz.ch
Summary
Young women with anorexia nervosa (AN) exhibit significant bone deficits. Advanced imaging reveals reduced bone density and altered bone structure, particularly in cortical bone, impacting skeletal health.
Area of Science:
- Endocrinology
- Osteology
- Nutritional Science
Background:
- Anorexia nervosa (AN) is associated with significant health complications, including compromised bone health.
- Bone density and structural integrity are crucial for skeletal strength and fracture prevention.
- Early identification and characterization of bone abnormalities in AN are vital for intervention.
Purpose of the Study:
- To compare bone density and architecture using three distinct measurement techniques in young women with AN versus controls.
- To investigate the relationship between AN severity, age of onset, and specific bone parameters.
- To evaluate the utility of three-dimensional periphery quantitative computer tomography (3D-pQCT) in assessing bone deficits in AN.
Main Methods:
- Participants included 36 women with AN (aged 18-30) and 30 age-matched controls.
- Bone assessment involved dual energy X-ray absorptiometry (DXA) at the spine and hip, quantitative ultrasound (QUS) at the heel, and 3D-pQCT at the ultradistal radius.
- Data analysis focused on comparing bone mineral density, bone architecture, and trabecular structure between groups.
Main Results:
- Women with AN showed significantly lower bone mineral density (DXA) at the spine and hip, and reduced broadband ultrasound attenuation (QUS) at the heel compared to controls.
- 3D-pQCT revealed significant deficits in the number of bone trabeculae and reduced cortical thickness in the AN group.
- Underweight severity correlated with hip bone deficits (DXA), while cortical bone deficits (3D-pQCT) were linked to the age of eating disorder onset.
Conclusions:
- Multiple measurement methods confirm significant deficits in both bone mineral density and bone structure (trabecular and cortical) in young women with anorexia nervosa.
- 3D-pQCT provides detailed insights into cortical bone structure alterations, which may be influenced by the age of AN onset.
- These findings underscore the widespread skeletal impact of AN and highlight the need for comprehensive bone assessment in affected individuals.