Related Experiment Videos
Chronic pain, depression, and the dexamethasone suppression test
Nicholas G Ward1, Judith A Turner, Brian Ready
1Department of Psychiatry and Behavioral Sciences, School of Medicine, University of Washington, Seattle, WA 98195 USA Department of Rehabilitation Medicine, School of Medicine, University of Washington, Seattle, WA 98195 USA Department of Anesthesiology, School of Medicine, University of Washington, Seattle, WA 98195 USA Department of Orthopedics, School of Medicine, University of Washington, Seattle, WA 98195 USA Department of Multidisciplinary Pain Center, School of Medicine, University of Washington, Seattle, WA 98195 USA.
The dexamethasone suppression test (DST) may not be a reliable marker for depression in chronic pain patients. Non-suppression is often influenced by factors like pain location and medication use, not just depression.
Area of Science:
- Endocrinology
- Psychiatry
- Pain Medicine
Background:
- Dexamethasone suppression test (DST) non-suppression is often observed in major depression patients.
- This non-suppression may serve as a potential biomarker for depression.
Purpose of the Study:
- To investigate the association between DST non-suppression and clinical variables in chronic pain patients.
- To determine the utility of DST non-suppression as a diagnostic marker for depression in this population.
Main Methods:
- The study included 81 inpatient chronic pain patients and 33 outpatient chronic back pain patients with depression.
- Dexamethasone suppression test (DST) results were analyzed against clinical data including depression, pain characteristics, surgery history, and medication use.
Main Results:
- DST non-suppression showed low sensitivity (24% in inpatients, 18% in outpatients) for detecting depression.
- Non-suppression was significantly higher in inpatients with headache pain only (69%) compared to other pain sites (15%).
- Non-suppressors had less prior surgery (inpatients) and higher opioid use (outpatients).
Conclusions:
- The DST appears to be clinically unreliable for detecting depression in chronic pain populations.
- Clinical variables such as pain location, prior surgery, and opioid use significantly affect DST results, confounding its diagnostic value for depression.