Researchers calculated the sensitivities and likelihood ratios for the ability of individual tests and combined tests to predict the presence or absence of nerve root impingement at midlumbar, low lumbar and specific nerve root levels.
For the diagnosis of the midlumbar impingement, the femoral stretch test, crossed FST, medial ankle pinprick sensation and patellar reflex testing was observed with the combinations of FST and either patellar reflex testing. For diagnosis of the low lumbar impingement, the Achilles reflex test did not increase likelihood ratios.
For the diagnosis of level-specific impingement likelihood ratios were observed for anterior thigh sensation at L2; FST at L3; patellar reflex testing, medial ankle sensation or crossed FST at L4; and hip abductor strength at L5. Test combinations increased the likelihood rations for level-specific root impingement at the L4 level only.
Read the abstract for “The Accuracy of the Physical Examination for the Diagnosis of Midlumbar and Low Lumbar Nerve Root Impingement.”
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