Dutch version of the Overall Anxiety Severity and Impairment Scale (OASIS): Psychometric properties and validation

M. Hermans, C.W. Korrelboom, S.A. Visser

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Abstract

Background
The Overall Anxiety Severity and Impairment Scale (OASIS) is a 5-item self-report measure that can be used to assess the impact of any anxiety disorder or multiple anxiety disorders. Prior US investigations have shown the OASIS to be a reliable and valid measure. To date the OASIS has not been validated for use in a Dutch sample of anxiety disordered patients.
Methods
The present study assessed the psychometric properties of a Dutch version of the OASIS in a clinical sample of anxiety patients. Latent structure, internal consistency, convergent and discriminant validity, and cutoff score analyses were conducted. Results were compared to those obtained from a clinical sample of patients with psychiatric diagnoses other than anxiety disorders.
Results
Principal component analysis supported a unidimensional structure. The five OASIS items loaded strongly on a single factor (eigenvalue=3.682, loadings=.80–.89) which accounted for 73.65% of the variance, and had a high degree of internal consistency (Cronbach׳s α=91). OASIS scores demonstrated robust correlations with other measures of anxiety, neuroticism and general distress. Correlations with unrelated constructs were weak. Mean score (8.46) and cutoff score of the Dutch sample of anxiety patients were lower than scores previously found in American samples. A cutoff score of 5 correctly classified 82.5% of this sample as having an anxiety disorder diagnosis or not. An improvement of 4 points is indicative of a clinically significant change.
Limitations
This study mainly relied on self-report measures in order to assess validity. Other types of measures should be used in future studies.
Conclusions
The Dutch version of the OASIS showed good reliability and validity. Its brevity and sound psychometric properties make it a good instrument for screening and assessment purposes in the field of anxiety disorders.
Keywords: Anxiety, Self-report, Assessment, Validity, Principal component analysis
Original languageEnglish
Pages (from-to)127-132
JournalJournal of Affective Disorders
Volume172
DOIs
Publication statusPublished - 2015

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@article{893a23a5e4c84732a18fe2537621ae44,
title = "Dutch version of the Overall Anxiety Severity and Impairment Scale (OASIS): Psychometric properties and validation",
abstract = "BackgroundThe Overall Anxiety Severity and Impairment Scale (OASIS) is a 5-item self-report measure that can be used to assess the impact of any anxiety disorder or multiple anxiety disorders. Prior US investigations have shown the OASIS to be a reliable and valid measure. To date the OASIS has not been validated for use in a Dutch sample of anxiety disordered patients.MethodsThe present study assessed the psychometric properties of a Dutch version of the OASIS in a clinical sample of anxiety patients. Latent structure, internal consistency, convergent and discriminant validity, and cutoff score analyses were conducted. Results were compared to those obtained from a clinical sample of patients with psychiatric diagnoses other than anxiety disorders.ResultsPrincipal component analysis supported a unidimensional structure. The five OASIS items loaded strongly on a single factor (eigenvalue=3.682, loadings=.80–.89) which accounted for 73.65{\%} of the variance, and had a high degree of internal consistency (Cronbach׳s α=91). OASIS scores demonstrated robust correlations with other measures of anxiety, neuroticism and general distress. Correlations with unrelated constructs were weak. Mean score (8.46) and cutoff score of the Dutch sample of anxiety patients were lower than scores previously found in American samples. A cutoff score of 5 correctly classified 82.5{\%} of this sample as having an anxiety disorder diagnosis or not. An improvement of 4 points is indicative of a clinically significant change.LimitationsThis study mainly relied on self-report measures in order to assess validity. Other types of measures should be used in future studies.ConclusionsThe Dutch version of the OASIS showed good reliability and validity. Its brevity and sound psychometric properties make it a good instrument for screening and assessment purposes in the field of anxiety disorders.Keywords: Anxiety, Self-report, Assessment, Validity, Principal component analysis",
author = "M. Hermans and C.W. Korrelboom and S.A. Visser",
year = "2015",
doi = "10.1016/j.jad.2014.09.033",
language = "English",
volume = "172",
pages = "127--132",
journal = "Journal of Affective Disorders",
issn = "0165-0327",
publisher = "Elsevier",

}

Dutch version of the Overall Anxiety Severity and Impairment Scale (OASIS) : Psychometric properties and validation. / Hermans, M.; Korrelboom, C.W.; Visser, S.A.

In: Journal of Affective Disorders, Vol. 172, 2015, p. 127-132.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Dutch version of the Overall Anxiety Severity and Impairment Scale (OASIS)

T2 - Psychometric properties and validation

AU - Hermans, M.

AU - Korrelboom, C.W.

AU - Visser, S.A.

PY - 2015

Y1 - 2015

N2 - BackgroundThe Overall Anxiety Severity and Impairment Scale (OASIS) is a 5-item self-report measure that can be used to assess the impact of any anxiety disorder or multiple anxiety disorders. Prior US investigations have shown the OASIS to be a reliable and valid measure. To date the OASIS has not been validated for use in a Dutch sample of anxiety disordered patients.MethodsThe present study assessed the psychometric properties of a Dutch version of the OASIS in a clinical sample of anxiety patients. Latent structure, internal consistency, convergent and discriminant validity, and cutoff score analyses were conducted. Results were compared to those obtained from a clinical sample of patients with psychiatric diagnoses other than anxiety disorders.ResultsPrincipal component analysis supported a unidimensional structure. The five OASIS items loaded strongly on a single factor (eigenvalue=3.682, loadings=.80–.89) which accounted for 73.65% of the variance, and had a high degree of internal consistency (Cronbach׳s α=91). OASIS scores demonstrated robust correlations with other measures of anxiety, neuroticism and general distress. Correlations with unrelated constructs were weak. Mean score (8.46) and cutoff score of the Dutch sample of anxiety patients were lower than scores previously found in American samples. A cutoff score of 5 correctly classified 82.5% of this sample as having an anxiety disorder diagnosis or not. An improvement of 4 points is indicative of a clinically significant change.LimitationsThis study mainly relied on self-report measures in order to assess validity. Other types of measures should be used in future studies.ConclusionsThe Dutch version of the OASIS showed good reliability and validity. Its brevity and sound psychometric properties make it a good instrument for screening and assessment purposes in the field of anxiety disorders.Keywords: Anxiety, Self-report, Assessment, Validity, Principal component analysis

AB - BackgroundThe Overall Anxiety Severity and Impairment Scale (OASIS) is a 5-item self-report measure that can be used to assess the impact of any anxiety disorder or multiple anxiety disorders. Prior US investigations have shown the OASIS to be a reliable and valid measure. To date the OASIS has not been validated for use in a Dutch sample of anxiety disordered patients.MethodsThe present study assessed the psychometric properties of a Dutch version of the OASIS in a clinical sample of anxiety patients. Latent structure, internal consistency, convergent and discriminant validity, and cutoff score analyses were conducted. Results were compared to those obtained from a clinical sample of patients with psychiatric diagnoses other than anxiety disorders.ResultsPrincipal component analysis supported a unidimensional structure. The five OASIS items loaded strongly on a single factor (eigenvalue=3.682, loadings=.80–.89) which accounted for 73.65% of the variance, and had a high degree of internal consistency (Cronbach׳s α=91). OASIS scores demonstrated robust correlations with other measures of anxiety, neuroticism and general distress. Correlations with unrelated constructs were weak. Mean score (8.46) and cutoff score of the Dutch sample of anxiety patients were lower than scores previously found in American samples. A cutoff score of 5 correctly classified 82.5% of this sample as having an anxiety disorder diagnosis or not. An improvement of 4 points is indicative of a clinically significant change.LimitationsThis study mainly relied on self-report measures in order to assess validity. Other types of measures should be used in future studies.ConclusionsThe Dutch version of the OASIS showed good reliability and validity. Its brevity and sound psychometric properties make it a good instrument for screening and assessment purposes in the field of anxiety disorders.Keywords: Anxiety, Self-report, Assessment, Validity, Principal component analysis

U2 - 10.1016/j.jad.2014.09.033

DO - 10.1016/j.jad.2014.09.033

M3 - Article

VL - 172

SP - 127

EP - 132

JO - Journal of Affective Disorders

JF - Journal of Affective Disorders

SN - 0165-0327

ER -