Validation of the 4DSQ Somatization subscale in the occupational health care setting as a screener

L. de Vroege, W.H.M. Emons, K. Sijtsma, R. Hoedeman, C.M. van der Feltz

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Purpose
Somatoform disorders (physical symptoms without medical explanation that cause dysfunction) are prevalent in the occupational health (OH) care setting and are associated with functional impairment and absenteeism. Availability of psychometric instruments aimed at assessing somatoform disorders is limited. In the OH setting, so far only the Patient-Health-Questionnaire 15 has been validated as screener for somatoform disorder, and has been shown to have moderate validity. The Four-Dimensional Symptom Questionnaire (4DSQ) is frequently used in the OH setting but the Somatization subscale is not validated yet. The aim of this study is to validate the 4DSQ Somatization subscale as screener for DSM-IV somatoform disorder in the OH setting by using the MINI interview as gold standard.
Methods
Employees absent from work due to physical symptoms, for a period longer than 6 weeks and shorter than 2 years, were asked to participate in this study. They filled out the 4DSQ and underwent a MINI interview by telephone for DSM-IV classification. Specificity and sensitivity scores were calculated for all possible cut-off scores and a receiver operator curve was computed for the Somatization subscale. 95 % confidence intervals (95 % CIs) were calculated for sensitivity and specificity.
Results
The Somatization subscale of the 4DSQ has an optimal cut point of 9, with specificity and sensitivity equal to 64.3 % [95 % CI (53.6; 73.7 %)] and 60.9 % [95 % CI (40.8; 77.8 %)], respectively. Receiver operator curves showed an area under the curve equal to 0.61 [SE = 0.07; 95 % CI (0.48; 0.75)] for the Somatization subscale of the 4DSQ.
Conclusion
The 4DSQ Somatization subscale is a questionnaire of moderate sensitivity and specificity.
Keywords: Four-Dimensional Symptom Questionnaire, Somatoform disorders, Occupational health setting, Sensitivity, Specificity
Original languageEnglish
Pages (from-to)105-115
JournalJournal of Occupational Rehabilitation
Volume25
Issue number1
DOIs
Publication statusPublished - 2015

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Occupational Health
Delivery of Health Care
Confidence Intervals
Diagnostic and Statistical Manual of Mental Disorders
Interviews
Absenteeism
Area Under Curve
Surveys and Questionnaires

Cite this

@article{b46a4d0ed6eb4cb2b2418642c45cd82c,
title = "Validation of the 4DSQ Somatization subscale in the occupational health care setting as a screener",
abstract = "Purpose Somatoform disorders (physical symptoms without medical explanation that cause dysfunction) are prevalent in the occupational health (OH) care setting and are associated with functional impairment and absenteeism. Availability of psychometric instruments aimed at assessing somatoform disorders is limited. In the OH setting, so far only the Patient-Health-Questionnaire 15 has been validated as screener for somatoform disorder, and has been shown to have moderate validity. The Four-Dimensional Symptom Questionnaire (4DSQ) is frequently used in the OH setting but the Somatization subscale is not validated yet. The aim of this study is to validate the 4DSQ Somatization subscale as screener for DSM-IV somatoform disorder in the OH setting by using the MINI interview as gold standard. Methods Employees absent from work due to physical symptoms, for a period longer than 6 weeks and shorter than 2 years, were asked to participate in this study. They filled out the 4DSQ and underwent a MINI interview by telephone for DSM-IV classification. Specificity and sensitivity scores were calculated for all possible cut-off scores and a receiver operator curve was computed for the Somatization subscale. 95 {\%} confidence intervals (95 {\%} CIs) were calculated for sensitivity and specificity. Results The Somatization subscale of the 4DSQ has an optimal cut point of 9, with specificity and sensitivity equal to 64.3 {\%} [95 {\%} CI (53.6; 73.7 {\%})] and 60.9 {\%} [95 {\%} CI (40.8; 77.8 {\%})], respectively. Receiver operator curves showed an area under the curve equal to 0.61 [SE = 0.07; 95 {\%} CI (0.48; 0.75)] for the Somatization subscale of the 4DSQ. Conclusion The 4DSQ Somatization subscale is a questionnaire of moderate sensitivity and specificity.Keywords: Four-Dimensional Symptom Questionnaire, Somatoform disorders, Occupational health setting, Sensitivity, Specificity",
author = "{de Vroege}, L. and W.H.M. Emons and K. Sijtsma and R. Hoedeman and {van der Feltz}, C.M.",
year = "2015",
doi = "10.1007/s10926-014-9529-2",
language = "English",
volume = "25",
pages = "105--115",
journal = "Journal of Occupational Rehabilitation",
issn = "1053-0487",
publisher = "Springer New York",
number = "1",

}

Validation of the 4DSQ Somatization subscale in the occupational health care setting as a screener. / de Vroege, L.; Emons, W.H.M.; Sijtsma, K.; Hoedeman, R.; van der Feltz, C.M.

In: Journal of Occupational Rehabilitation, Vol. 25, No. 1, 2015, p. 105-115.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Validation of the 4DSQ Somatization subscale in the occupational health care setting as a screener

AU - de Vroege, L.

AU - Emons, W.H.M.

AU - Sijtsma, K.

AU - Hoedeman, R.

AU - van der Feltz, C.M.

PY - 2015

Y1 - 2015

N2 - Purpose Somatoform disorders (physical symptoms without medical explanation that cause dysfunction) are prevalent in the occupational health (OH) care setting and are associated with functional impairment and absenteeism. Availability of psychometric instruments aimed at assessing somatoform disorders is limited. In the OH setting, so far only the Patient-Health-Questionnaire 15 has been validated as screener for somatoform disorder, and has been shown to have moderate validity. The Four-Dimensional Symptom Questionnaire (4DSQ) is frequently used in the OH setting but the Somatization subscale is not validated yet. The aim of this study is to validate the 4DSQ Somatization subscale as screener for DSM-IV somatoform disorder in the OH setting by using the MINI interview as gold standard. Methods Employees absent from work due to physical symptoms, for a period longer than 6 weeks and shorter than 2 years, were asked to participate in this study. They filled out the 4DSQ and underwent a MINI interview by telephone for DSM-IV classification. Specificity and sensitivity scores were calculated for all possible cut-off scores and a receiver operator curve was computed for the Somatization subscale. 95 % confidence intervals (95 % CIs) were calculated for sensitivity and specificity. Results The Somatization subscale of the 4DSQ has an optimal cut point of 9, with specificity and sensitivity equal to 64.3 % [95 % CI (53.6; 73.7 %)] and 60.9 % [95 % CI (40.8; 77.8 %)], respectively. Receiver operator curves showed an area under the curve equal to 0.61 [SE = 0.07; 95 % CI (0.48; 0.75)] for the Somatization subscale of the 4DSQ. Conclusion The 4DSQ Somatization subscale is a questionnaire of moderate sensitivity and specificity.Keywords: Four-Dimensional Symptom Questionnaire, Somatoform disorders, Occupational health setting, Sensitivity, Specificity

AB - Purpose Somatoform disorders (physical symptoms without medical explanation that cause dysfunction) are prevalent in the occupational health (OH) care setting and are associated with functional impairment and absenteeism. Availability of psychometric instruments aimed at assessing somatoform disorders is limited. In the OH setting, so far only the Patient-Health-Questionnaire 15 has been validated as screener for somatoform disorder, and has been shown to have moderate validity. The Four-Dimensional Symptom Questionnaire (4DSQ) is frequently used in the OH setting but the Somatization subscale is not validated yet. The aim of this study is to validate the 4DSQ Somatization subscale as screener for DSM-IV somatoform disorder in the OH setting by using the MINI interview as gold standard. Methods Employees absent from work due to physical symptoms, for a period longer than 6 weeks and shorter than 2 years, were asked to participate in this study. They filled out the 4DSQ and underwent a MINI interview by telephone for DSM-IV classification. Specificity and sensitivity scores were calculated for all possible cut-off scores and a receiver operator curve was computed for the Somatization subscale. 95 % confidence intervals (95 % CIs) were calculated for sensitivity and specificity. Results The Somatization subscale of the 4DSQ has an optimal cut point of 9, with specificity and sensitivity equal to 64.3 % [95 % CI (53.6; 73.7 %)] and 60.9 % [95 % CI (40.8; 77.8 %)], respectively. Receiver operator curves showed an area under the curve equal to 0.61 [SE = 0.07; 95 % CI (0.48; 0.75)] for the Somatization subscale of the 4DSQ. Conclusion The 4DSQ Somatization subscale is a questionnaire of moderate sensitivity and specificity.Keywords: Four-Dimensional Symptom Questionnaire, Somatoform disorders, Occupational health setting, Sensitivity, Specificity

U2 - 10.1007/s10926-014-9529-2

DO - 10.1007/s10926-014-9529-2

M3 - Article

VL - 25

SP - 105

EP - 115

JO - Journal of Occupational Rehabilitation

JF - Journal of Occupational Rehabilitation

SN - 1053-0487

IS - 1

ER -