Purpose Patients with low back pain (LBP) rarely have serious underlying pathology but frequently undergo inappropriate imaging. A range of guidelines and red flag features are utilised to characterise appropriate imaging. This scoping review explores how LBP imaging appropriateness is determined and calculated in studies of primary care practice. Methods This scoping review builds upon a previous meta-analysis, incorporating articles identified that were published since 2014, with an updated search to capture articles published since the original search. Electronic databases were searched, and citation lists of included papers were reviewed. Inclusion criteria were studies assessing adult LBP imaging appropriateness in a primary care setting. Twenty-three eligible studies were identified. Results A range of red flag features were utilised to determine imaging appropriateness. Most studies considered appropriateness in a binary manner, by the presence of any red flag feature. Ten guidelines were referenced, with 7/23 (30%) included studies amending or not referencing any guideline. The method for calculating the proportion of inappropriate imaging varied. Ten per cent of the studies used the total number of patients presenting with LBP as the denominator, suggesting most studies overestimated the rate of inappropriate imaging, and did not capture where imaging is not performed for clinically suspicious LBP. Conclusion Greater clarity is needed on how we define and measure imaging appropriateness for LBP, which also accounts for the problem of failing to image when indicated. An internationally agreed methodology for imaging appropriateness studies would ultimately lead to an improvement in the care delivered to patients.
Graphic abstractThese slides can be retrieved under Electronic Supplementary Material.Key points 1. Inappropriate imaging for low back pain (LBP) is common, and there are a range of guidelines available for determining imaging appropriateness.2. This study reviews the appropriateness criteria used in primary care studies, identifying broad variation in the criteria used.3. It identifies that many studies include red flags with poor predictive values for serious causes of LBP, and also highlights that studies using varying methods for calculating the proportion of inappropriate imaging.Yates M, Oliveira CB, Galloway JB, Maher CG (2019) Defining and measuring imaging appropriateness in low back pain studies: A scoping review. Eur Spine J; 0 5 10 15 20 Neurological impairment Urinary retenƟon or inconƟnence Fever Loss of anal sphincter tone/faecal inconƟnence Motor deficits Spinal malformaƟons Non mechanical pain Night pain Anaemia Sexual dysfuncƟon Response to NSAIDs Radiculopathy N Bar chart displaying relative frequencies of clinical features used as red flags for LBP imaging. Yates M, Oliveira CB, Galloway JB, Maher CG (2019) Defining and measuring imaging appropriateness in low back pain studies: A scoping review. Eur Spine J;Take Home Messages 1. There is much variation in red flags and method...