Brief Report: Psychometric Properties of the Patient Health Questionaire-9 (PHQ-9) in Autistic Adults

Samuel R C Arnold^{1

2}, Mirko Uljarević³, Ye In Hwang^{4

5}, Amanda L Richdale^{6

5}, Julian N Trollor^{4

5}, Lauren P Lawson^{6

5}

Affiliations

¹ Department of Developmental Disability Neuropsychiatry (3DN), UNSW Sydney, 34 Botany St, Sydney, NSW, 2052, Australia. samuel.arnold@unsw.edu.au.
² Cooperative Research Centre for Living with Autism (Autism CRC), Brisbane, QLD, Australia. samuel.arnold@unsw.edu.au.
³ Stanford Autism Center, Division of Child and Adolescent Psychiatry, Department of Psychiatry and Behavioral Sciences, School of Medicine, Stanford University, Stanford, USA.
⁴ Department of Developmental Disability Neuropsychiatry (3DN), UNSW Sydney, 34 Botany St, Sydney, NSW, 2052, Australia.
⁵ Cooperative Research Centre for Living with Autism (Autism CRC), Brisbane, QLD, Australia.
⁶ Olga Tennison Autism Research Centre, School of Psychology and Public Health, La Trobe University, Bundoora, VIC, Australia.

PMID: 30847710
DOI: 10.1007/s10803-019-03947-9

Brief Report: Psychometric Properties of the Patient Health Questionaire-9 (PHQ-9) in Autistic Adults

Samuel R C Arnold et al. J Autism Dev Disord. 2020 Jun.

. 2020 Jun;50(6):2217-2225.

doi: 10.1007/s10803-019-03947-9.

Authors

Samuel R C Arnold^{1

2}, Mirko Uljarević³, Ye In Hwang^{4

5}, Amanda L Richdale^{6

5}, Julian N Trollor^{4

5}, Lauren P Lawson^{6

5}

Affiliations

¹ Department of Developmental Disability Neuropsychiatry (3DN), UNSW Sydney, 34 Botany St, Sydney, NSW, 2052, Australia. samuel.arnold@unsw.edu.au.
² Cooperative Research Centre for Living with Autism (Autism CRC), Brisbane, QLD, Australia. samuel.arnold@unsw.edu.au.
³ Stanford Autism Center, Division of Child and Adolescent Psychiatry, Department of Psychiatry and Behavioral Sciences, School of Medicine, Stanford University, Stanford, USA.
⁴ Department of Developmental Disability Neuropsychiatry (3DN), UNSW Sydney, 34 Botany St, Sydney, NSW, 2052, Australia.
⁵ Cooperative Research Centre for Living with Autism (Autism CRC), Brisbane, QLD, Australia.
⁶ Olga Tennison Autism Research Centre, School of Psychology and Public Health, La Trobe University, Bundoora, VIC, Australia.

PMID: 30847710
DOI: 10.1007/s10803-019-03947-9

Abstract

Despite the high prevalence of depression and other mental illnesses in autistic adults, screening instruments such as the Patient Health Questionnaire (PHQ-9) have not been specifically validated in an autistic sample. Using data from two Autism CRC longitudinal studies (n = 581), confirmatory factor analysis supported the two-factor model (somatic and cognitive/affective) in the autistic sample and one-factor model in the community comparison sample. Confirmatory bifactor analysis also supported use of the PHQ-9 total score in autism. Good convergent validity was found with two measures of psychological well-being for PHQ-9 total and subdomain scores. The PHQ-9 is a useful tool for autism research allowing comparison across autistic and non-autistic participants.

Keywords: Adults; Autism; Depression; Factor analysis; PHQ-9; Validation.

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Brief Report: Psychometric Properties of the Patient Health Questionaire-9 (PHQ-9) in Autistic Adults

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Brief Report: Psychometric Properties of the Patient Health Questionaire-9 (PHQ-9) in Autistic Adults

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