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Comparing the distress thermometer (DT) with the patient health questionnaire (PHQ)-2 for screening for possible cases of depression among patients newly diagnosed with advanced cancer

Published online by Cambridge University Press:  13 November 2013

Mark Lazenby ,
Jane Dixon ,
Mei Bai  and
Ruth McCorkle
Mark Lazenby*
Affiliation:
Yale University School of Nursing, New Haven, Connecticut
Jane Dixon
Affiliation:
Yale University School of Nursing, New Haven, Connecticut
Mei Bai
Affiliation:
Yale University School of Nursing, New Haven, Connecticut
Ruth McCorkle
Affiliation:
Yale University School of Nursing, New Haven, Connecticut
*
Address correspondence and reprint requests to: Mark Lazenby, Yale University School of Nursing, New Haven, CT 06477. E-mail: mark.lazenby@yale.edu
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Abstract

Objective:

Distress screening guidelines call for rapid screening for emotional distress at the time of cancer diagnosis. The purpose of this study was to examine the distress thermometer's (DT) ability to screen in patients in treatment for advanced cancer who may be depressed.

Methods:

Using cross-sectional data collected from patients within 30 days of diagnosis with advanced cancer, this study used ROC analysis to determine the optimal-cutoff point of the distress thermometer (DT) for screening for depression as measured by the physician health questionnaire (PHQ)-9; inter-test reliability analysis to compare the DT with the PHQ-2 for screening in possible cases of depression, and multivariate analysis to examine associations among the DT emotional problem list (EPL) items with cases of depression.

Results:

The average age of the 123 patients in the study was 59.9 (12.9) years. Seventy (56.9%) were female. All had Stage 3 or 4 cancers (40% gastrointestinal, 19% gynecologic, 20% head and neck, 21% lung). The mean DT score was 4 (2.7)/10; and 56 (43%) were depressed as measured by the PHQ-9 ≥5. The optimal DT cut-off score to screen in possible cases of depression was ≥2/10, with a sensitivity of .96, compared to a sensitivity of .32 of the PHQ-2 ≥2. Correlation coefficients for the DT ≥2 and the PHQ-2 with the PHQ-9 ≥5 were 0.4 and −0.2, respectively. EPL items associated with cases of depression were Depression (OR = 0.15, 0.02–0.85) and Sadness (OR = 0.21, 0.06–0.72).

Significance of Results:

The optimal DT threshold for identifying possible cases of depression at the time of diagnosis is ≥2; this threshold is more sensitive than the PHQ-2 ≥2. EPL items may be used with the DT score to triage patients for evaluation.

Keywords

DistressScreeningCancerDepressionDistress Thermometer
Type
Original Articles
Information
Palliative & Supportive Care , Volume 12 , Issue 1 , February 2014 , pp. 63 - 68
Copyright
Copyright © Cambridge University Press 2013 

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