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1 October 2002 | Volume 137 Issue 7 | Pages 586-597
Purpose: To review evidence on the diagnostic accuracy of clinical information and imaging for patients with low back pain in primary care settings.
Data Source: MEDLINE search (January 1966 to September 2001) for articles and reviews relevant to the accuracy of the clinical and radiographic examination of patients with low back pain.
Study Selection: The authors reviewed abstracts and selected articles for review on the basis of a combined judgment. Data on the clinical examination were based primarily on recent systematic reviews; data on imaging tests were based primarily on original articles.
Data Extraction: Diagnostic results were extracted by one or the other author. Quality of methods was evaluated informally. Major potential biases were identified, but neither quantitative data extraction nor scoring was done.
Data Synthesis: Formal meta-analysis was not used because the diagnostic hardware and software, gold standards, and patient selection methods were heterogeneous and the number of studies was small. Sensitivity for cancer was highest for magnetic resonance imaging (0.83 to 0.93) and radionuclide scanning (0.74 to 0.98); specificity was highest for magnetic resonance imaging (0.9 to 0.97) and radiography (0.95 to 0.99). Magnetic resonance imaging was the most sensitive (0.96) and specific (0.92) test for infection. The sensitivity and specificity of magnetic resonance imaging for herniated discs were slightly higher than those for computed tomography but very similar for the diagnosis of spinal stenosis.
Conclusions: The data suggest a diagnostic strategy similar to the 1994 Agency for Health Care Policy and Research guidelines. For adults younger than 50 years of age with no signs or symptoms of systemic disease, symptomatic therapy without imaging is appropriate. For patients 50 years of age and older or those whose findings suggest systemic disease, plain radiography and simple laboratory tests can almost completely rule out underlying systemic diseases. Advanced imaging should be reserved for patients who are considering surgery or those in whom systemic disease is strongly suspected.
Author and Article Information
From University of Washington, Seattle, Washington.
Grant Support: In part by grants HS-08194 and HS-094990 from the Agency for Healthcare Research and Quality, a Veterans Affairs ERIC grant, and grant 1 P60 AR48093 from the National Institute of Arthritis and Musculoskeletal and Skin Diseases.
Requests for Single Reprints: Jeffrey G. Jarvik, MD, MPH, Department of Radiology, University of Washington, Box 357115, 1959 NE Pacific Street, Seattle, WA 98195; e-mail, jarvikj{at}u.washington.edu.
Current Author Addresses: Dr. Jarvik, MD, MPH, Department of Radiology, University of Washington, Box 357115, 1959 NE Pacific Sreet, Seattle, WA 98195.
Dr. Deyo: Center for Cost and Outcomes Research, 146 North Canal Street, #300, Seattle, WA 98103. ACADEMIA AND CLINIC
COMMON DIAGNOSTIC TESTS
Series Editors: Allan Garber, MD, PhD, and Harold Sox, MD
Diagnostic Evaluation of Low Back Pain with Emphasis on Imaging
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