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. 2019 Mar;52(3):230-238.
doi: 10.1002/eat.22988. Epub 2018 Dec 22.

Impact of expanded diagnostic criteria for avoidant/restrictive food intake disorder on clinical comparisons with anorexia nervosa

Kendra R Becker  1   2 , Ani C Keshishian  1 , Rachel E Liebman  1   2 , Kathryn A Coniglio  3 , Shirley B Wang  1   4 , Debra L Franko  1   5 , Kamryn T Eddy  1   2 , Jennifer J Thomas  1   2
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Impact of expanded diagnostic criteria for avoidant/restrictive food intake disorder on clinical comparisons with anorexia nervosa

Kendra R Becker et al. Int J Eat Disord. 2019 Mar.

Abstract

Objective: Avoidant/restrictive food intake disorder (ARFID) and anorexia nervosa (AN) are restrictive eating disorders. There is a proposal before the American Psychiatric Association to broaden the current DSM-5 criteria for ARFID, which currently require dietary intake that is inadequate to support energy or nutritional needs. We compared the clinical presentations of ARFID and AN in an outpatient sample to determine how a more inclusive definition of ARFID, heterogeneous for age and weight status, is distinct from AN.

Methods: As part of standard care, 138 individuals with AN or ARFID completed an online assessment battery and agreed to include their responses in research.

Results: Individuals with ARFID were younger, reported earlier age of onset, and had higher percent median BMI (%mBMI) than those with AN (all ps < .001). Individuals with ARFID scored lower on measures of eating pathology, depression, anxiety, and clinical impairment (all ps < .05), but did not differ from those with AN on restrictive eating (p = .52), and scored higher on food neophobia (p < .001).

Discussion: Allowing psychosocial impairment to be sufficient for an ARFID diagnosis resulted in a clinical picture of ARFID such that %mBMI was higher (and in the normal range) compared with AN. Differences in gender distribution, age, and age of onset remained consistent with previous research. Both groups reported similar levels of dietary restriction, although ARFID can be distinguished by relatively higher levels of food neophobia. Currently available measures of eating pathology may capture certain ARFID symptoms, but highlight the need for measures of impairment relative to ARFID.

Keywords: anorexia nervosa; avoidant/restrictive food intake disorder; food neophobia; impairment; outpatient; restriction.

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References

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