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The Oxford Agoraphobic Avoidance Scale

Lookup NU author(s): Charlotte Aynsworth, Liz Murphy, Dr Rob DudleyORCiD

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Abstract

Copyright © The Author(s), 2021. Published by Cambridge University Press.Background Agoraphobic avoidance of everyday situations is a common feature in many mental health disorders. Avoidance can be due to a variety of fears, including concerns about negative social evaluation, panicking, and harm from others. The result is inactivity and isolation. Behavioural avoidance tasks (BATs) provide an objective assessment of avoidance and in situ anxiety but are challenging to administer and lack standardisation. Our aim was to draw on the principles of BATs to develop a self-report measure of agoraphobia symptoms. Method The scale was developed with 194 patients with agoraphobia in the context of psychosis, 427 individuals in the general population with high levels of agoraphobia, and 1094 individuals with low levels of agoraphobia. Factor analysis, item response theory, and receiver operating characteristic analyses were used. Validity was assessed against a BAT, actigraphy data, and an existing agoraphobia measure. Test-retest reliability was assessed with 264 participants. Results An eight-item questionnaire with avoidance and distress response scales was developed. The avoidance and distress scales each had an excellent model fit and reliably assessed agoraphobic symptoms across the severity spectrum. All items were highly discriminative (avoidance: a = 1.24-5.43; distress: a = 1.60-5.48), indicating that small increases in agoraphobic symptoms led to a high probability of item endorsement. The scale demonstrated good internal reliability, test-retest reliability, and validity. Conclusions The Oxford Agoraphobic Avoidance Scale has excellent psychometric properties. Clinical cut-offs and score ranges are provided. This precise assessment tool may help focus attention on the clinically important problem of agoraphobic avoidance.


Publication metadata

Author(s): Lambe S, Bird JC, Loe BS, Rosebrock L, Kabir T, Petit A, Mulhall S, Jenner L, Aynsworth C, Murphy E, Jones J, Powling R, Chapman K, Dudley R, Morrison A, Regan EO, Yu L-M, Clark D, Waite F, Freeman D

Publication type: Article

Publication status: Published

Journal: Psychological Medicine

Year: 2021

Issue: ePub ahead of Print

Online publication date: 23/08/2021

Acceptance date: 15/06/2021

ISSN (print): 0033-2917

ISSN (electronic): 1469-8978

Publisher: Cambridge University Press

URL: https://doi.org/10.1017/S0033291721002713

DOI: 10.1017/S0033291721002713


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