{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,4]],"date-time":"2026-10-04T21:30:46Z","timestamp":1791149446131,"version":"4.1.0"},"reference-count":48,"publisher":"Journal of Orthopaedic & Sports Physical Therapy (JOSPT)","issue":"3","content-domain":{"domain":["www.jospt.org"],"crossmark-restriction":true},"short-container-title":["Journal of Orthopaedic &amp; Sports Physical Therapy"],"published-print":{"date-parts":[[2016,3]]},"abstract":"<jats:sec><jats:title>Study Design<\/jats:title><jats:p> Randomized clinical trial. <\/jats:p><\/jats:sec><jats:sec><jats:title>Background<\/jats:title><jats:p> The recommended initial management strategy for patients with low back pain and signs of nerve root compression is conservative treatment, but there is little evidence to guide the most appropriate management strategy. Preliminary research suggests that a treatment protocol of mechanical traction and extension-oriented exercises may be effective, particularly in a specific subgroup of patients. <\/jats:p><\/jats:sec><jats:sec><jats:title>Objective<\/jats:title><jats:p> To examine the effectiveness of mechanical traction in patients with lumbar nerve root compression and within a predefined subgroup. <\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p> One hundred twenty patients with low back pain with nerve root compression were recruited from physical therapy clinics. Using predefined subgrouping criteria, patients were stratified at baseline and randomized to receive an extension-oriented treatment approach with or without the addition of mechanical traction. During a 6-week period, patients received up to 12 treatment visits. Primary outcomes of pain and disability were collected at 6 weeks, 6 months, and 1 year by assessors blinded to group allocation. Outcomes were examined using linear mixed-model analyses examining change over time by treatment and the interaction between treatment and subgrouping status. <\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p> The mean \u00b1 SD age of participants was 41.1 \u00b1 11.3 years, median duration of symptoms was 62 days, and 57% were male. No significant differences in disability or pain outcomes were noted between treatment groups at any time point, nor was any interaction found between subgroup status and treatment. <\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p> Patients with lumbar nerve root compression presenting for physical therapy can expect significant changes in disability and pain over a 6-week treatment period. There is no evidence that mechanical lumbar traction in combination with an extension-oriented treatment is superior to extension-oriented exercises alone in the management of these patients or within a predefined subgroup of patients. The study protocol was registered with ClinicalTrials.gov (NCT00942227). <\/jats:p><\/jats:sec><jats:sec><jats:title>Level of Evidence<\/jats:title><jats:p> Therapy, level 2b. J Orthop Sports Phys Ther 2016;46(3):144\u2013154. 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