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The burden of neuropathic pain: A systematic review and meta-analysis of health utilities

Doth, Alissa H.a,b; Hansson, Per T.c,d; Jensen, Mark P.e; Taylor, Rod S.f,*,1

doi: 10.1016/j.pain.2010.02.034
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Patients with neuropathic pain (NeuP) experience substantially lower health-related quality of life (HRQoL) than the general population. The aim of this systematic review and meta-analysis is to test the hypothesis that NeuP is associated with low levels of health utility. A structured search of electronic databases (MEDLINE, EMBASE, Cochrane Library and CINAHL) was undertaken. Reference lists of retrieved reports were also reviewed. Studies reporting utility single-index measures (preference based) in NeuP were included. Random effects meta-analysis was used to pool EQ-5D index utility estimates across NeuP conditions. The association of utilities and pre-defined factors (NeuP condition, patient age, sex, duration and severity of pain and method of utility scoring) was examined using meta-regression. Twenty-four studies reporting health utility values in patients with NeuP were included in the review. Weighted pooled utility score across the studies varied from a mean of 0.15 for failed back surgery syndrome to 0.61 for post-herpetic neuralgia and diabetic neuropathy. Although there was substantial heterogeneity (P < 0.0001) across studies, we found little variation in utility as a function of patient and study characteristics. The single exception was a significant relationship (P < 0.0001) between increasing neuropathic pain severity and a reduction in utility. This study confirms the hypothesis that patients with NeuP experience low utilities and therefore low HRQoL. However, the contribution of non-NeuP co-morbidity remains unclear. Neuropathic pain severity emerged as a primary predictor of the negative health impact of NeuP.

aHealth Policy and Management, University of Minnesota, USA

bMedtronic Neuromodulation, Minneapolis, USA

cDepartment of Molecular Medicine & Surgery, Karolinska Institute, Stockholm, Sweden

dDepartment of Neurosurgery, Karolinska University Hospital, Stockholm, Sweden

eUniversity of Washington School of Medicine, Seattle, USA

fPeninsula Medical School, Universities of Exeter & Plymouth, UK

*Corresponding author. Address: Peninsula Medical School, Universities of Exeter & Plymouth, Noy Scott House, 3rd Floor, Barrack Rd., Exeter EX2 5DW, UK. Tel.: +44 1392 406980; fax: +44 1392 406401.

E-mail address:rod.taylor@pms.ac.uk

1The statistical analysis was conducted by Rod Taylor.

E-mail address:rod.taylor@pms.ac.uk

Submitted July 8, 2009; revised January 20, 2010; accepted February 19, 2010.

© 2010 Lippincott Williams & Wilkins, Inc.
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