Article Synopsis
- The study reviews the diagnostic tests used in physical examinations for cervical radiculopathy, focusing on their accuracy and effectiveness.
- It finds that Spurling's test shows high specificity but variable sensitivity, while other common neurological tests lack sufficient evidence.
- The results suggest that clinicians might combine specific tests to improve diagnosis accuracy when patient history aligns with test findings.
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Article Abstract
Background Context: In clinical practice, the diagnosis of cervical radiculopathy is based on information from the patient's history, physical examination, and diagnostic imaging. Various physical tests may be performed, but their diagnostic accuracy is unknown.
Purpose: This study aimed to summarize and update the evidence on diagnostic performance of tests carried out during a physical examination for the diagnosis of cervical radiculopathy.
Study Design: A review of the accuracy of diagnostic tests was carried out.
Study Sample: The study sample comprised diagnostic studies comparing results of tests performed during a physical examination in diagnosing cervical radiculopathy with a reference standard of imaging or surgical findings.
Outcome Measures: Sensitivity, specificity, likelihood ratios are presented, together with pooled results for sensitivity and specificity.
Methods: A literature search up to March 2016 was performed in CENTRAL, PubMed (MEDLINE), Embase, CINAHL, Web of Science, and Google Scholar. The methodological quality of studies was assessed using the QUADAS-2.
Results: Five diagnostic accuracy studies were identified. Only Spurling's test was evaluated in more than one study, showing high specificity ranging from 0.89 to 1.00 (95% confidence interval [CI]: 0.59-1.00); sensitivity varied from 0.38 to 0.97 (95% CI: 0.21-0.99). No studies were found that assessed the diagnostic accuracy of widely used neurological tests such as key muscle strength, tendon reflexes, and sensory impairments.
Conclusions: There is limited evidence for accuracy of physical examination tests for the diagnosis of cervical radiculopathy. When consistent with patient history, clinicians may use a combination of Spurling's, axial traction, and an Arm Squeeze test to increase the likelihood of a cervical radiculopathy, whereas a combined results of four negative neurodynamics tests and an Arm Squeeze test could be used to rule out the disorder.
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