• Health Psychol · May 2010

    The pain, depression, and fatigue symptom cluster in advanced breast cancer: covariation with the hypothalamic-pituitary-adrenal axis and the sympathetic nervous system.

    • Lisa M Thornton, Barbara L Andersen, and Wendy P Blakely.
    • Department of Psychology & Comprehensive Cancer Center, Ohio State University, 1835 Neil Avenue, Columbus, OH 43210, USA. thornton.84@osu.edu
    • Health Psychol. 2010 May 1; 29 (3): 333-7.

    ObjectiveNeuroendocrine-immune models have been proposed to account for the frequent co-occurrence of pain, depression, and fatigue (PDF) among cancer patients.DesignIn a cross-sectional observational study of advanced cancer patients (N = 104), we tested the hypothesis that the PDF cluster covaries with proposed biological mediators: hormones of the sympathetic nervous system (SNS) and the hypothalamic-pituitary-adrenal (HPA) axis.Main Outcome MeasuresPDF symptoms were measured using the Brief Pain Inventory, Fatigue Symptom Inventory, and the Center for Epidemiological Studies Depression scales. HPA activation was indicated by plasma levels of cortisol and adrenocorticotropic hormone, and SNS activation was indicated by plasma epinephrine and norepinephrine.ResultsPreliminary analyses supported the use of covariance structure modeling to test whether shared variance among hormone levels predicted shared variance among PDF symptoms. Latent variable analysis indicated that neuroendocrine levels predicted PDF (standardized beta = .23, p = .039), while controlling for important disease and demographic variables.ConclusionPrevious studies have linked individual symptoms to individual biomarkers. The observed significant paring of the 4 hormones to the PDF cluster provides the first evidence suggestive of stress hormones as a common mechanism for the co-occurrence of pain, depression, and fatigue symptoms.(c) 2010 APA, all rights reserved.

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