Konstantinou, K, Lewis, M and Dunn, KM (2012) Agreement of self-reported items and clinically assessed nerve root involvement (or sciatica) in a primary care setting. European Spine Journal, 21 (11). 2306 - 2315. ISSN 0940-6719

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Abstract

INTRODUCTION: We analysed baseline measures from an RCT involving adults with low back pain (LBP) with or without referred leg pain, to identify self-report items that best identified clinically determined nerve root involvement (sciatica). METHODS: Potential indicators of nerve root involvement were gathered using a self-reported questionnaire. Participants underwent a standardised physical examination on the same day as questionnaire completion. Self-reported items were compared to a reference standard (clinical diagnosis) using sensitivity, specificity, predictive values, likelihood ratios (LRs), the area under the receiver operating characteristic curve and logistic regression. Two reference standards are presented: one based on a clinical diagnosis of nerve root problems and excluding possible/inconclusive cases (referred to as a confirmatory reference), and the other being inclusive of possible/inconclusive cases (referred to as an indicative reference). RESULTS: Pain below knee was the best single item for diagnostic accuracy with an area under curve (AUC) of 0.67-0.68, which however is slightly less than the 'acceptable discrimination'. A cluster of three items, including distribution of pain below the knee, leg pain that is worse than back pain, and feeling of numbness or pins and needles in the leg, did improve discrimination to an 'acceptable' level with an AUC of 0.72-0.74 in relation to confirmatory and indicative references, respectively. However, the likelihood ratios from the models were reflective of a 'small' amount of discrimination. CONCLUSION: In this primary care population seeking treatment for LBP with or without leg pain, we found no clear set of self-report items that accurately identified patients with nerve root pain. When accurate case definition is important, clinical assessment should be the method of choice for identifying LBP with possible nerve root involvement.

Item Type: Article
Additional Information: This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited.
Uncontrolled Keywords: sciatica; diagnostic accuracy; self-report; epidemiology; low back pain
Subjects: R Medicine > R Medicine (General)
R Medicine > RA Public aspects of medicine
Divisions: Faculty of Medicine and Health Sciences > Primary Care Health Sciences
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Depositing User: Symplectic
Date Deposited: 29 Mar 2018 14:36
Last Modified: 29 Mar 2018 14:36
URI: http://eprints.keele.ac.uk/id/eprint/4675

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