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Evaluation of a Randomized Controlled Trial in the Management of Chronic Lower Back Pain in a French Automotive Industry: An Observational Study

      Abstract

      Nassif H, Brosset N, Guillaume M, Delore-Milles E, Tafflet M, Buchholz F, Toussaint J-F. Evaluation of a randomized controlled trial in the management of chronic lower back pain in a French automotive industry: an observational study.

      Objective

      To evaluate a specific workplace intervention for the management of chronic lower back pain among employees working in assembly positions in the automotive industry.

      Design

      Randomized controlled trial.

      Setting

      On site at the workplace of a French automotive manufacturer.

      Participants

      Subjects (N=75 volunteers) were recruited on site and randomly assigned to either an experimental group (n=37) or a control group (n=38).

      Intervention

      The experimental group followed a supervised 60-minute session, 3 times per week, of muscle strengthening, flexibility, and endurance training during 2 months. The control group received no direct intervention. Evaluation took place at baseline, 2 months, and 6 months.

      Main Outcome Measures

      Pain related parameters were evaluated using validated questionnaires and scales translated into French (Quebec Back Pain Disability Scale, Rolan Morris Disability Questionnaire, Dallas Pain Questionnaire, and the Tampa Scale for Kinesiophobia). Perceived pain intensity was evaluated using the numerical rating scale, and physical outcome measures were evaluated using specific indicators (flexibility, Biering-Sorensen Test, Shirado test). The multivariate analysis of variance, t test, and Wilcoxon signed-rank test were used for statistical analysis.

      Results

      We observed a significant beneficial effect (P<.025) for the experimental group at 2 and 6 months in pain parameters, specific flexibility, and in back functions, and a significant improvement at 6 months in the control group for the perceived pain intensity, anterior flexion, flexibility of quadriceps, and Dallas Pain Questionnaire's work recreational score. An increase in the practice of physical activity outside the workplace was noted in both groups at 2 months but persisted at 6 months for the experimental group.

      Conclusions

      This study reinforces the multiple health benefits of physical activity and physical therapy modalities in the workplace by assisting individuals at risk who have chronic LBP.

      Key Words

      List of Abbreviations:

      CONT (control group), Danx-dep (impact of work on anxiety and depression symptoms), Ddaily (impact of pain on daily activity), Dsocial (impact of pain on social activity), Dwork-rec (impact of pain on work and recreational activity), EXP (experimental group), FFD (finger to floor distance), FTD (finger to tip of toes distance), HBD (heel-buttock distance), KTD (knee to table distance), LBP (lower back pain), MANOVA (multivariate analysis of variance), MSD (multiple skeletal defects), NRS (numerical rating scale), RMDQ (Roland Morris Disability Questionnaire)
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