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JOURNAL ARTICLE

A consensus approach toward the standardization of back pain definitions for use in prevalence studies

Clermont E Dionne, Kate M Dunn, Peter R Croft, Alf L Nachemson, Rachelle Buchbinder, Bruce F Walker, Mary Wyatt, J David Cassidy, Michel Rossignol, Charlotte Leboeuf-Yde, Jan Hartvigsen, Päivi Leino-Arjas, Ute Latza, Shmuel Reis, Maria Teresa Gil Del Real, Francisco M Kovacs, Birgitta Oberg, Christine Cedraschi, Lex M Bouter, Bart W Koes, H Susan J Picavet, Maurits W van Tulder, Kim Burton, Nadine E Foster, Gary J Macfarlane, Elaine Thomas, Martin Underwood, Gordon Waddell, Paul Shekelle, Ernest Volinn, Michael Von Korff
Spine 2008 January 1, 33 (1): 95-103
18165754

STUDY DESIGN: A modified Delphi study conducted with 28 experts in back pain research from 12 countries.

OBJECTIVE: To identify standardized definitions of low back pain that could be consistently used by investigators in prevalence studies to provide comparable data.

SUMMARY OF BACKGROUND DATA: Differences in the definition of back pain prevalence in population studies lead to heterogeneity in study findings, and limitations or impossibilities in comparing or summarizing prevalence figures from different studies.

METHODS: Back pain definitions were identified from 51 articles reporting population-based prevalence studies, and dissected into 77 items documenting 7 elements. These items were submitted to a panel of experts for rating and reduction, in 3 rounds (participation: 76%). Preliminary results were presented and discussed during the Amsterdam Forum VIII for Primary Care Research on Low Back Pain, compared with scientific evidence and confirmed and fine-tuned by the panel in a fourth round and the preparation of the current article.

RESULTS: Two definitions were agreed on a minimal definition (with 1 question covering site of low back pain, symptoms observed, and time frame of the measure, and a second question on severity of low back pain) and an optimal definition that is made from the minimal definition and add-ons (covering frequency and duration of symptoms, an additional measure of severity, sciatica, and exclusions) that can be adapted to different needs.

CONCLUSION: These definitions provide standards that may improve future comparisons of low back pain prevalence figures by person, place and time characteristics, and offer opportunities for statistical summaries.

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