Correlation between self-reported recovery and central sensitization in whiplash patients

Background: Central sensitization has been associated with chronic pain in whiplash patients. Methods: Consecutive whiplash patients were assessed at 3 months post-whiplash injury with the brachial plexus provocation test (BPPT) as a sign of central sensitization. Self-reported recovery was assessed by the response to the question 'Do you feel you have recovered fully from your accident injuries?' Results: Sixty-nine subjects (32 males, 37 females, age 37.5 +/- 13.0 years (mean +/- SD), range 18-71) were included. Of these, 34 reported a lack of recovery, and 35 reported recovery at 3 months post-injury. The mean BPPT elbow extension (from 180 degrees) was 41.5 +/- 23.0 degrees, and the mean VAS score for the BPPT was 2.2 +/- 1.2 (out of 10). Those who reported recovery had a mean BPPT elbow extension angle of 25.1 +/- 15.8 while those who did not report recovery had a mean BPPT angle of 58.4 +/- 15.9 (P < 0.05). The visual analogue scale (VAS) score for recovered subjects was 1.8 +/- 1.1 and 2.7 +/- 1.1 (P < 0.05) for non-recovered. There was a moderate correlation between self-reported recovery and BPPT elbow extension angle (-0.44) and a lower correlation between self-reported recovery and VAS score (-0.30). Conclusion: Self-reported recovery correlates well with a lower likelihood of signs of central sensitization. Copyright (C) 2012, Shanghai University of Sport. Production and hosting by Elsevier B. V. All rights reserved.