Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/30566
Appears in Collections:Psychology Journal Articles
Peer Review Status: Refereed
Title: Measurement invariance of assessments of depression (PHQ-9) and anxiety (GAD-7) across sex, strata and linguistic backgrounds in a European-wide sample of patients after Traumatic Brain Injury
Author(s): Teymoori, Ali
Real, Ruben
Gorbunova, Anastasia
Haghish, E F
Andelic, Nada
Wilson, Lindsay
Asendorf, Thomas
Menon, David
von Steinbüchel, Nicole
Contact Email: l.wilson@stir.ac.uk
Keywords: Depression
Anxiety
Measurement invariance
Differential Item Functioning (DIF)
Issue Date: Feb-2020
Citation: Teymoori A, Real R, Gorbunova A, Haghish EF, Andelic N, Wilson L, Asendorf T, Menon D & von Steinbüchel N (2020) Measurement invariance of assessments of depression (PHQ-9) and anxiety (GAD-7) across sex, strata and linguistic backgrounds in a European-wide sample of patients after Traumatic Brain Injury. Journal of Affective Disorders, 262, pp. 278-285. https://doi.org/10.1016/j.jad.2019.10.035
Abstract: Background The Patient Health Questionnaire-9 (PHQ-9) and the Generalized Anxiety Disorder (GAD-7) are two widely used instruments to screen patients for depression and anxiety. Comparable psychometric properties across different demographic and linguistic groups are necessary for multiple group comparison and international research on depression and anxiety. Objectives and Method We examine measurement invariance for the PHQ-9 and GAD-7 by: (a) the sex of the participants, (b) recruitment stratum, and (c) linguistic background. This study is based on non-randomized observational data six months after Traumatic Brain Injury (TBI) that were collected in 18 countries. We used multiple methods to detect Differential Item Functioning (DIF) including Item Response Theory, logistic regression, and the Mantel-Haenszel method. Results At the 6-month post-injury, 2137 (738 [34.5%] women) participants completed the PHQ-9 and GAD-7 questionnaires: 885 [41.4%] patients were primarily admitted to the Intensive Care Unit (ICU), 805 [37.7%] were admitted to hospital ward, and 447 [20.9%] were evaluated in the Emergency Room and discharged. Results supported the invariance of PHQ-9 and GAD-7 across sex, patient strata and linguistic background. For different strata three PHQ-9 items and one GAD-7 item and for different linguistic groups only two GAD-7 items were flagged as showing differences in two out of four DIF tests. However, the magnitude of the DIF effect was negligible. Limitation Despite high number of participants from ICU, patients have mostly mild TBI. Conclusion The findings demonstrate adequate psychometric properties for PHQ-9 and GAD-7, allowing direct multigroup comparison across sex, strata, and linguistic background.
DOI Link: 10.1016/j.jad.2019.10.035
Rights: [Teymoori-etal-JAD-2019.pdf] This item has been embargoed for a period. During the embargo please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study. Accepted refereed manuscript of: Teymoori A, Real R, Gorbunova A, Haghish EF, Andelic N, Wilson L, Asendorf T, Menon D & von Steinbüchel N (2020) Measurement invariance of assessments of depression (PHQ-9) and anxiety (GAD-7) across sex, strata and linguistic backgrounds in a European-wide sample of patients after Traumatic Brain Injury. Journal of Affective Disorders, 262, pp. 278-285. DOI: https://doi.org/10.1016/j.jad.2019.10.035 © 2019, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
[Teymoori et al 2019 Measurement invariance of assessments of depression (PHQ-9) and anxiety (GAD-7).pdf] The publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.
Licence URL(s): http://creativecommons.org/licenses/by-nc-nd/4.0/

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