title: Different DHEA-S Levels and Response Patterns in Individuals with Chronic Neck Pain, Compared with a Pain Free Group-a Pilot Study.
abstract: To test, in this pilot study, whether DHEA-S (Dehydroepiandrosterone, sulfated form) plasma levels are lower among persons with chronic neck pain, compared to control persons, and to investigate the DHEA-S response after a physical exercise.
  
  
  
  Included were 12 persons with chronic neck pain and eight controls without present pain, all 18 and 65 years of age. Exclusion criteria for both groups were articular diseases or tendinosis, fibromyalgia, systemic inflammatory and neuromuscular diseases, pain conditions due to trauma, or severe psychiatric diseases.
  
  
  
  The participants arm-cycled on an ergometer for 30 minutes. Blood samples were taken before, 60 minutes, and 150 minutes after this standardized physical exercise.
  
  
  
  The estimated plasma DHEA-S levels at baseline were 2.0 µmol/L (95% confidence interval [CI] 1.00; 4.01) in the pain group and 4.1 µmol/L (95% CI2.0; 8.6) in the control group, adjusted for sex, age, body mass index (BMI), and Shirom-Melamed Burnout Questionnaire (SMBQ), with a ratio of 0.48 ( P  = 0.094).
  
  
  
  In this pilot study, the plasma DHEA-S levels appeared to be lower among the persons with chronic neck pain, compared with the control group. It was indicated that DHEA-S decreased during the physical exercise in the control group, and either increased or was unaffected in the chronic pain group.
authors: Health Metrics, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.|Occupational and Environmental Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Sweden.|Pain and Rehabilitation Centre, and Department of Medical and Health Science, Linköping University, Linköping, Sweden.
authors: A
authors: A
authors: Grimby-Ekman
authors: Pain and Rehabilitation Centre, and Department of Medical and Health Science, Linköping University, Linköping, Sweden.
authors: B
authors: B
authors: Ghafouri
authors: Occupational and Environmental Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Sweden.
authors: H
authors: H
authors: Sandén
authors: Pain and Rehabilitation Centre, and Department of Medical and Health Science, Linköping University, Linköping, Sweden.
authors: B
authors: B
authors: Larsson
authors: Pain and Rehabilitation Centre, and Department of Medical and Health Science, Linköping University, Linköping, Sweden.
authors: B
authors: B
authors: Gerdle
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D015415:Biomarkers / Q000097:blood; D059350:Chronic Pain / Q000097:blood* / Q000175:diagnosis*; D019314:Dehydroepiandrosterone Sulfate / Q000097:blood*; D005080:Exercise Test; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D019547:Neck Pain / Q000097:blood* / Q000175:diagnosis* / Q000628:therapy; D010147:Pain Measurement / Q000379:methods*; D010865:Pilot Projects; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D016896:Treatment Outcome; D055815:Young Adult
chemical_list: D015415:Biomarkers; D019314:Dehydroepiandrosterone Sulfate
keywords: Chronic Pain; Dehydroepiandrosterone; Neck; Physical Activity; Physical Exercise