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  • Title: Diagnostic value of trunk flexion-extension testing in old chronic low back pain patients.
    Author: Kienbacher T, Fehrmann E, Habenicht R, Oeffel C, Kollmitzer J, Mair P, Ebenbichler G.
    Journal: Eur Spine J; 2017 Feb; 26(2):510-517. PubMed ID: 27600250.
    Abstract:
    PURPOSE: Dynamic trunk flexion-extension testing has been proven to objectively diagnose low back pain in persons under the age of 60 years but older persons have difficulty complying with standardized movement velocity. METHODS: 190 patients and 71 matched healthy volunteers (18-90 years of age) performed modified testing by holding static positions at standing, half, and full trunk flexion. RESULTS: Lumbar extensor muscle activity in isometric positions was significantly higher in patients with higher activity in the oldest (60-90 years) and the middle-aged (40-59 years) but not in the youngest (18-39 years) subgroups compared to normal. There were no differences in gross trunk range of motion, half flexion relaxation ratio, proprioception, muscle activity differences between positions, and fear-avoidance behavior. The diagnostic accuracy as expressed by the area under the curve was fair (0.74). CONCLUSIONS: Lumbar extensor muscle activity demonstrated moderate to good diagnostic value in old patients.
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