Abstract
Purpose: ‘Red flags’ are patient responses and findings on history taking and physical examination that are associated with an increased risk of serious spinal disorders. The purpose of this paper is to identify red flags reported in the low back pain literature, establish consensus on whether (or not) they are considered red flags, and review the evidence for these signs and symptoms.
Methods: The following databases were searched using key words ‘red flag’ and ‘low back pain’:
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MEDLINE (1951→)
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EMBASE (1974→)
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CINAHL (1982→)
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PsycINFO (1806→)
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AMED (1985→)
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PEDro.
In addition, national guidelines and key texts were hand-searched. Each red flag identified in the literature was classified using The Guidelines Development Group’s format (where 100% coverage = ‘unanimity’; 75–99% = ‘consensus’; 51–74% = ‘majority view’; and 0–50% = ‘no consensus’), and the findings summarized.
Results: The electronic searches revealed 54 papers, with the resultant ‘red flags’ ranging from ‘no consensus’ to ‘unanimity’. Evidence for these signs and symptoms is variable. Case reports and series justify labelling some features ‘red flags’, whilst others owe their label to clinical experience and expert opinion.
Conclusion: Case reports and series should be reported/ published to help identify those signs and symptoms suggestive of serious spinal disorders and those more likely to be ‘red herrings’. Despite their importance, there is inconsistency within the literature in identifying true red flags and, an ability to identify these signs and symptoms is essential for all who practise spinal assessments.
Correspondence should be addressed to Ms Alison McGregor, c/o BOA, SBPR at the Royal College of Surgeons, 35–43 Lincoln’s Inn Fields, London WC2A 3PE.
