Display Settings:

Format

Send to:

Choose Destination
See comment in PubMed Commons below
Am J Phys Med Rehabil. 2011 Mar;90(3):233-8; quiz 239-42. doi: 10.1097/PHM.0b013e31820b163b.

Specificity of needle electromyography for lumbar radiculopathy in 55- to 79-yr-old subjects with low back pain and sciatica without stenosis.

Author information

  • Michigan Head and Spine Institute and Providence Hospital, 29275 Northwestern Highway, Southfield, MI 48034, USA.

Erratum in

  • Am J Phys Med Rehabil. 2011 Oct;90(10):874.

Abstract

OBJECTIVE:

The aim of this study was to determine the specificity of needle electromyography for lumbar radiculopathy in subjects with low back pain and sciatica without stenosis.

DESIGN:

Subjects 55 yrs or older with diagnoses of low back pain and sciatica underwent a standardized monopolar needle evaluation by blinded electromyographers as part of a spinal stenosis study. The presence or absence of radiculopathy was determined using different electrodiagnostic criteria.

RESULTS:

Seventy-two subjects with a mean age of 64.6 years (SD, 7.0 yrs) were studied. When only positive sharp waves or fibrillations were considered abnormal, most of the diagnostic criteria--two limb muscles + associated lumbar paraspinal muscle abnormal, two limb muscles abnormal, or one limb muscle + associated lumbar paraspinal muscle abnormal--had 97%, 96%, and 92% specificity, respectively. When 30% or greater polyphasia in the limb muscles was also considered abnormal, the respective specificities were 90%, 81%, and 85%. When 20% or greater polyphasia in the limb muscles was also considered abnormal, the respective specificities were 90%, 74%, and 71% [corrected].

CONCLUSIONS:

There is good specificity for lumbosacral radiculopathy when appropriate diagnostic criteria are used.

PMID:
21297400
[PubMed - indexed for MEDLINE]
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Icon for Lippincott Williams & Wilkins
    Loading ...
    Write to the Help Desk