Eva Ørnbøl

Screening for depression: Rasch analysis of the structural validity of the PHQ-9 in acutely injured trauma survivors

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Screening for depression : Rasch analysis of the structural validity of the PHQ-9 in acutely injured trauma survivors. / Christensen, Kaj Sparle; Oernboel, Eva; Zatzick, Doug; Russo, Joan.

In: Journal of Psychosomatic Research, Vol. 97, 06.2017, p. 18-22.

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@article{cab3104513b2491ea5743664b045d084,
title = "Screening for depression: Rasch analysis of the structural validity of the PHQ-9 in acutely injured trauma survivors",
abstract = "OBJECTIVE: The Patient Health Questionnaire (PHQ-9) is widely used for screening of depression in acutely injured trauma survivors. Rasch analysis has been used to evaluate its measurement characteristics. This paper aims: 1) to assess the psychometric properties of the nine PHQ-9 items and 2) to determine the structural validity of using the total PHQ-9 score as a clinical outcome measure.METHODS: PHQ-9 data for 937 persons aged 18-60years admitted to 20 level 1 trauma centers in the United States were included. Good model fit indicates that all items contribute to a single underlying trait.RESULTS: Item 2 demonstrated misfit to the Rasch model, and six items showed disordered response categories. Ordered response categories were achieved for all nine items after modifying the original four-point scoring system into a three-point system. Person separation reliability was acceptable (0.80) for discriminating between groups of patients. Dimensionality testing supported combining the nine items into a total score. No significant differential item functioning was observed for sex and age group.CONCLUSION: Despite some minor problems with its measurement structure, the short nine-item version of the PHQ seems to be an economic and valid instrument for the screening of depression in adults admitted to level 1 trauma centers.",
keywords = "Journal Article",
author = "Christensen, {Kaj Sparle} and Eva Oernboel and Doug Zatzick and Joan Russo",
note = "Copyright {\textcopyright} 2017 Elsevier Inc. All rights reserved.",
year = "2017",
month = jun,
doi = "10.1016/j.jpsychores.2017.03.117",
language = "English",
volume = "97",
pages = "18--22",
journal = "Journal of Psychosomatic Research",
issn = "0022-3999",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Screening for depression

T2 - Rasch analysis of the structural validity of the PHQ-9 in acutely injured trauma survivors

AU - Christensen, Kaj Sparle

AU - Oernboel, Eva

AU - Zatzick, Doug

AU - Russo, Joan

N1 - Copyright © 2017 Elsevier Inc. All rights reserved.

PY - 2017/6

Y1 - 2017/6

N2 - OBJECTIVE: The Patient Health Questionnaire (PHQ-9) is widely used for screening of depression in acutely injured trauma survivors. Rasch analysis has been used to evaluate its measurement characteristics. This paper aims: 1) to assess the psychometric properties of the nine PHQ-9 items and 2) to determine the structural validity of using the total PHQ-9 score as a clinical outcome measure.METHODS: PHQ-9 data for 937 persons aged 18-60years admitted to 20 level 1 trauma centers in the United States were included. Good model fit indicates that all items contribute to a single underlying trait.RESULTS: Item 2 demonstrated misfit to the Rasch model, and six items showed disordered response categories. Ordered response categories were achieved for all nine items after modifying the original four-point scoring system into a three-point system. Person separation reliability was acceptable (0.80) for discriminating between groups of patients. Dimensionality testing supported combining the nine items into a total score. No significant differential item functioning was observed for sex and age group.CONCLUSION: Despite some minor problems with its measurement structure, the short nine-item version of the PHQ seems to be an economic and valid instrument for the screening of depression in adults admitted to level 1 trauma centers.

AB - OBJECTIVE: The Patient Health Questionnaire (PHQ-9) is widely used for screening of depression in acutely injured trauma survivors. Rasch analysis has been used to evaluate its measurement characteristics. This paper aims: 1) to assess the psychometric properties of the nine PHQ-9 items and 2) to determine the structural validity of using the total PHQ-9 score as a clinical outcome measure.METHODS: PHQ-9 data for 937 persons aged 18-60years admitted to 20 level 1 trauma centers in the United States were included. Good model fit indicates that all items contribute to a single underlying trait.RESULTS: Item 2 demonstrated misfit to the Rasch model, and six items showed disordered response categories. Ordered response categories were achieved for all nine items after modifying the original four-point scoring system into a three-point system. Person separation reliability was acceptable (0.80) for discriminating between groups of patients. Dimensionality testing supported combining the nine items into a total score. No significant differential item functioning was observed for sex and age group.CONCLUSION: Despite some minor problems with its measurement structure, the short nine-item version of the PHQ seems to be an economic and valid instrument for the screening of depression in adults admitted to level 1 trauma centers.

KW - Journal Article

U2 - 10.1016/j.jpsychores.2017.03.117

DO - 10.1016/j.jpsychores.2017.03.117

M3 - Journal article

C2 - 28606494

VL - 97

SP - 18

EP - 22

JO - Journal of Psychosomatic Research

JF - Journal of Psychosomatic Research

SN - 0022-3999

ER -