title: The chronic pain patient and functional assessment: use of the 6-Minute Walk Test in a multidisciplinary pain clinic.
abstract: OBJECTIVE
  For chronic pain treatment, guidelines and regulatory agencies have defined functional improvement as a primary goal, especially when chronic opioid therapy is used. Functional improvement is frequently evaluated by qualitative questioning. This pilot study sought to establish a simple and inexpensive measure of functional change for a chronic pain population.
  
  
  METHODS
  Using a multidisciplinary pain clinic standard physical therapy approach for all entering chronic pain patients, multiple functional tests were performed, including the 6-Minute Walk Test. Data was collected by retrospective chart review, at entry to the clinic and 3-6 months later and compared using simple t-test statistics on 45 patients.
  
  
  RESULTS
  The average distance walked at center admission was 272.87 yards. At 3-6 month clinical retesting, the distance had improved significantly to 339.04 yards (p<0.0001). NRS scores at 3-6 months were also improved from baseline (p<0.001).
  
  
  CONCLUSIONS
  While suggestive, this study has significant limitations. Not all patients entering into the clinic were included in this study, only those who had completed the necessary testing. Further, chart reviews are complicated by the accuracy with which data is recorded. This study is intriguing and presents positive data for a simple, inexpensive and reproducible test for physical functioning in a chronic pain population. Further study is warranted based on these descriptive results.
authors.affiliation: The Center for Bioethics, Pain Management and Medicine , Lexington, KY , USA.
authors.forename: John F
authors.initials: JF
authors.lastname: Peppin
authors.forename: Steve
authors.initials: S
authors.lastname: Marcum
authors.forename: Kenneth L
authors.initials: KL
authors.lastname: Kirsh
mesh_terms: D059350:Chronic Pain / Q000503:physiopathology*; D005080:Exercise Test; D006801:Humans; D018710:Pain Clinics / Q000458:organization & administration*; D016138:Walking