Cancer · 2008 · 407 citations · 30 references
NursingOncologyPsychologyBehavioral HealthCancer Symptom ManagementHealth AssessmentAnxiety AssessmentDepression AssessmentEmotional Distress AssessmentPsychological TestingReferral CriteriaSymptom Burden AssessmentCancer-related Psychological DistressEmotional Distress ScreeningPatient-reported DistressPsychological Distress ScreeningPsychosocial FunctioningScreening Cutoffs For DistressSymptom Assessment ToolsSymptom Distress Measurement
BACKGROUND: The objectives of this study were to validate the Distress Thermometer (DT) in the Netherlands and to examine its correspondence with a 46-item Problem List, possible risk factors, and the wish for a referral. METHODS: A cross-sectional group of 277 cancer patients who were treated at 9 hospitals filled in the DT and the Hospital Anxiety and Depression Scale and rated the presence and severity of problems (response rate, 49%). RESULTS: Receiver operating characteristic analyses identified an ideal cutoff score of 5 on the DT with a positive predictive value of 39% and a negative predictive value of 95%. The Problem List appeared to be a reliable measure. Five items on the Problem List correlated strongly with the DT, 13 items had a moderately strong correlation, 26 items were correlated weakly, and 2 items were not correlated significantly. Emotional control, nervousness, pain, and physical fitness appeared to contribute independently to the DT score. The percentage of patients scoring > or =5 (n = 118 patients; 43%) who wanted (14%) or maybe wanted (29%) a referral was significantly higher than the percentage of patients with DT scores <5 (5% and 13%, respectively) who wanted or maybe wanted a referral. Intensively treated patients reported more distress than those who only underwent surgery. No other clear risk factors for distress were identified. CONCLUSIONS: The DT appeared to be a good instrument for routine screening and ruling out elevated distress. Emotional and physical problems contributed mainly to distress. Experiencing clinically elevated distress did not necessarily suggest that patients wanted a referral. Screening for distress and the wish for a referral can facilitate providing support for those patients who most need and want it.
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Statistical Power Analysis for the Behavioral Sciences
Keith E. Muller, Jacob Cohen · Technometrics · 1989 · 83.9K citations
The Hospital Anxiety and Depression Scale
A. S. Zigmond, R. P. Snaith · Acta Psychiatrica Scandinavica · 1983 · 46.6K citations
Statistics notes: Cronbach's alpha: Table 1
J M. Bland · BMJ · 1997 · 5.3K citations · Full text