Comparisons of Bone Density and Body Composition Among Adolescents with Anorexia Nervosa and Atypical Anorexia Nervosa

Overview

Journal Int J Eat Disord

Publisher Wiley

Specialty Social Sciences

Date 2019 Feb 17

PMID 30771231

Citations 18

Authors

Jason M Nagata

Jennifer L Carlson

Neville H Golden

Jin Long

Stuart B Murray

Rebecka Peebles

Affiliations

Soon will be listed here.

Abstract

Objective: To compare bone mineral density (BMD) and body composition among adolescents: (a) with atypical anorexia nervosa (AAN) versus anorexia nervosa (AN) and (b) those with and without a prior history of overweight.

Method: Electronic medical records of patients 9-20 years with AN or AAN who underwent dual-energy x-ray absorptiometry scans were retrospectively reviewed and analyzed.

Results: A total of 286 adolescents with AN or AAN were included. In linear regression models, AAN was associated with greater Z-scores in whole body bone mineral content (BMC, B = 0.88, p < 0.001), lumbar spine BMD (B = 0.79, p = 0.002), femoral neck BMD (B = 0.670, p = 0.009); fat mass index (B = 1.33, p = 0.003), and lean body mass index (LBMI, B = 1.10, p < 0.001) compared to AN, adjusting for age, sex, and duration of illness. A prior overweight history was associated with greater Z-scores in whole body BMC; lumbar spine BMD, total hip BMD, femoral neck BMD, and LBMI.

Discussion: Adolescents with AAN had higher BMD Z-scores than adolescents with AN; adolescents with a prior overweight history had greater BMD Z-scores than adolescents without a prior overweight history. These findings may inform clinical guidelines for the medical management of AAN.

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