A randomized controlled trial investigating effects of an individualized pedometer driven walking program on chronic low back pain

Angelica E Lang, Paul A Hendrick, Lynne Clay, Prosanta Mondal, Catherine M Trask, Brenna Bath, Erika D Penz, Samuel A Stewart, G David Baxter, Deidre A Hurley, Suzanne M McDonough, Stephan Milosavljevic, Angelica E Lang, Paul A Hendrick, Lynne Clay, Prosanta Mondal, Catherine M Trask, Brenna Bath, Erika D Penz, Samuel A Stewart, G David Baxter, Deidre A Hurley, Suzanne M McDonough, Stephan Milosavljevic

Abstract

Background: Walking is an easily prescribed physical activity for people with low back pain (LBP). However, the evidence for its effectiveness to improve pain and disability levels for people with chronic low back pain (CLBP) within a community setting has not been evaluated. This study evaluates the effectiveness of a clinician guided, pedometer-driven, walking intervention for increasing physical activity and improving clinical outcomes compared to education and advice.

Methods: Randomized controlled trial recruiting N = 174 adults with CLBP. Participants were randomly allocated into either a standardized care group (SG) or pedometer based walking group (WG) using minimization allocation with a 2:1 ratio to the WG. Prior to randomization all participants were given a standard package of education and advice regarding self-management and the benefits of staying active. Following randomization the WG undertook a physiotherapist guided pedometer-driven walking program for 12 weeks. This was individually tailored by weekly negotiation of daily step targets. Main outcome was the Oswestry Disability Index (ODI) recorded at baseline, 12 weeks, 6 and 12 months. Other outcomes included, numeric pain rating, International Physical Activity Questionnaire (IPAQ), Fear-Avoidance Beliefs Questionnaire (FABQ), Back Beliefs questionnaire (BBQ), Physical Activity Self-efficacy Scale, and EQ-5D-5L quality of life estimate.

Results: N = 138 (79%) participants completed all outcome measures at 12 weeks reducing to N = 96 (55%) at 12 months. Both observed and intention to treat analysis did not show any statistically significant difference in ODI change score between the WG and the SG at all post-intervention time points. There were also no significant between group differences for change scores in all secondary outcome measures. Post hoc sensitivity analyses revealed moderately disabled participants (baseline ODI ≥ 21.0) demonstrated a greater reduction in mean ODI scores at 12 months in the WG compared to SG, while WG participants with a daily baseline step count < 7500 steps demonstrated a greater reduction in mean ODI scores at 12 weeks.

Conclusions: Overall, we found no significant difference in change of levels of (ODI) disability between the SG and WG following the walking intervention. However, ODI responses to a walking program for those with moderate levels of baseline disability and those with low baseline step count offer a potential future focus for continued research into the benefit of walking as a management strategy for chronic LBP.

Trial registration: United States National Institutes of Health Clinical Trails registry (http://ClinicalTrials.gov/) No. NCT02284958 (27/10/2014).

Keywords: Chronic low back pain; Intervention; Physical therapy; Walking.

Conflict of interest statement

The authors declare they have no competing interests.

Figures

Fig. 1
Fig. 1
Consort Diagram
Fig. 2
Fig. 2
Average daily steps per week

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