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Ethnic differences in responses to multiple experimental pain stimuli
Claudia M Campbell1, Robert R Edwards, Roger B Fillingim
1College of Clinical and Health Psychology, University of Florida, Gainesville, FL 32610-0404, USA. ccampbell@dental.ufl.edu
Pain
|December 29, 2004
Summary
African Americans reported lower pain tolerance and higher pain unpleasantness than white individuals across multiple experimental pain types. Hypervigilance, not passive coping, partially explained these differences in pain perception.
Area of Science:
- Pain perception research
- Experimental psychology
- Health disparities
Background:
- Clinical pain experience varies across ethnocultural groups.
- Previous studies suggest higher experimental pain sensitivity in African Americans, but often use single pain modalities.
- Understanding ethnic differences in pain response is crucial for equitable healthcare.
Purpose of the Study:
- To investigate ethnic differences in responses to multiple experimental pain stimuli (heat, cold pressor, ischemic).
- To explore the role of psychological factors (coping, hypervigilance) in these ethnic differences.
- To determine if African Americans and white individuals differ in pain threshold, tolerance, and intensity/unpleasantness ratings.
Main Methods:
- 120 healthy young adults (62 African American, 58 white) underwent heat, cold pressor, and ischemic pain tests.
- Pain thresholds and tolerances were measured for each modality.
- Participants completed psychological questionnaires assessing pain coping and hypervigilance.
- Statistical analyses controlled for psychological variables to assess their influence on ethnic differences.
Main Results:
- No ethnic differences were found for pain thresholds.
- African Americans exhibited significantly lower pain tolerances for heat, cold pressor, and ischemic pain compared to white individuals.
- African Americans reported higher intensity and unpleasantness ratings for suprathreshold heat stimuli.
- African Americans utilized more passive pain coping strategies and reported higher hypervigilance.
- Controlling for hypervigilance eliminated significant ethnic differences in heat and ischemic pain tolerance.
Conclusions:
- Significant ethnic differences exist in laboratory pain responses, particularly in pain tolerance and perception of suprathreshold stimuli.
- Hypervigilance appears to be a significant factor mediating ethnic differences in pain tolerance.
- Further research is needed to elucidate the mechanisms driving these observed ethnic variations in pain experience.