For Doctors in a Hurry
- Researchers investigated whether physical therapy or cognitive behavioral therapy works better as initial treatment for chronic low back pain.
- This multisite randomized trial followed 749 adults with chronic low back pain through two stages of sequential clinical interventions.
- Physical therapy yielded a 2.8 point greater functional improvement (96% CI, 0.38 to 5.1) than cognitive behavioral therapy at ten weeks.
- The researchers concluded that physical therapy is a viable first-line option, though second-stage mindfulness or switching treatments showed no differences.
- Clinicians should note that the functional gains from physical therapy remained below the minimum clinically important difference of six points.
Optimizing Conservative Management for Chronic Low Back Pain
Chronic low back pain remains a leading cause of global disability, frequently requiring a multidisciplinary approach to manage persistent symptoms and functional decline [1]. While exercise therapy and yoga have demonstrated efficacy in reducing pain and improving quality of life, their long-term benefits often plateau, leaving clinicians to decide on the next step for patients who do not respond to initial care [2, 3]. Psychological interventions like cognitive behavioral therapy are frequently integrated with physical rehabilitation to address the complex biobehavioral nature of the condition [4, 5]. However, the comparative effectiveness of these modalities as first-line treatments and the utility of specific secondary strategies remain poorly defined in clinical practice [6]. To address this gap, a recent multisite trial provides concrete evidence on the optimal sequencing of these nonpharmacologic interventions over a one-year period, offering physicians a clearer roadmap for initial referrals and salvage therapies.
Sequential Trial Design and Patient Characteristics
To determine the most effective pathway for managing persistent symptoms, the researchers conducted a multisite sequential, multiple-assignment, randomized trial. This specific study design allows investigators to evaluate the effectiveness of different treatment sequences and adaptive interventions, mimicking the real-world clinical process of adjusting therapy when a patient fails to improve. The trial (NCT03859713) was carried out across three distinct health care systems and enrolled 749 adults diagnosed with chronic low back pain. Funding was provided by the Patient-Centered Outcomes Research Institute. To evaluate clinical impact, the authors utilized two co-primary outcomes: function and pain intensity. Function was assessed using the Oswestry Disability Index (ODI), a validated 0-to-100 scale that measures how back pain limits a patient's ability to perform daily activities. Pain intensity was recorded on a standard 0-to-10 scale. These metrics were tracked over a 52-week follow-up period, with specific assessments occurring at 10 weeks to mark the end of Stage I, 26 weeks, and 52 weeks to mark the end of Stage II. This longitudinal approach allowed the researchers to observe both the immediate effects of first-stage treatments and the long-term outcomes of secondary strategies for patients who did not initially respond to care.
Functional Gains Favor Initial Physical Therapy
The first phase of the trial involved an eight-week intervention where participants were assigned to receive either physical therapy or cognitive behavioral therapy. Upon completion of this initial stage at the 10-week assessment, the researchers observed that the physical therapy group showed greater improvement in function compared to those receiving cognitive behavioral therapy. This functional advantage was quantified by an adjusted mean difference of 2.8 on the Oswestry Disability Index (96% CI, 0.38 to 5.1). While this result was statistically significant, clinicians should note that the mean difference of 2.8 remained below the threshold of 6 points, which is the established minimum important difference for this specific functional scale. The minimum important difference represents the smallest change in a treatment outcome that a patient would actually notice and identify as meaningful. In contrast to the functional outcomes, the study found no significant difference in pain intensity between the two treatment arms at the 10-week mark. The adjusted mean difference in pain scores was 0.32 (99% CI, -0.07 to 0.71). This suggests that while physical therapy may offer a slight edge in restoring daily activities, it does not provide superior analgesic effects over cognitive behavioral therapy in the short term. The 10-week data indicates that initiating care with physical therapy may be a reasonable first-line strategy for clinicians prioritizing early functional recovery, though the magnitude of the benefit may be modest for the individual patient.
Secondary Strategies for Nonresponders
For patients who did not achieve adequate clinical improvement during the initial eight weeks of therapy, the study evaluated secondary interventions. These nonresponders were randomly assigned again to receive an additional eight weeks of Stage II treatment. This second phase of the protocol was designed to determine whether a specific salvage strategy was more effective for those with persistent symptoms. The interventions for these participants involved either switching treatments, meaning moving from physical therapy to cognitive behavioral therapy or vice versa, or initiating a mindfulness program. Long-term follow-up data collected at 52 weeks indicated that the specific secondary strategy employed did not lead to divergent clinical outcomes. The researchers found no differences in Stage II treatments for nonresponders regarding function, with an adjusted mean difference on the Oswestry Disability Index of 0.43 (96% CI, -0.29 to 2.4). Furthermore, there were no differences in Stage II treatments for nonresponders regarding pain intensity, which showed an adjusted mean difference of -0.05 (96% CI, -0.58 to 0.48). For the practicing physician, these findings suggest that when a patient fails to respond to initial conservative management, there is no single superior second-line option. Switching to an alternative modality or adding mindfulness results in comparable functional and analgesic outcomes at one year, allowing clinicians to base next steps on patient preference and local resource availability.
Barriers to Treatment Initiation and Study Limitations
The clinical utility of any intervention is often limited by the practicalities of patient engagement, and this trial highlighted significant hurdles in treatment uptake. The researchers observed that treatment initiation was lower than expected, a factor that may influence the generalizability of the findings to broader clinical populations. This difficulty in starting the assigned protocols was particularly evident for cognitive behavioral therapy and for nonresponders who were randomized to a second stage of treatment. The lower rates of initiation suggest that behavioral interventions may face higher logistical or psychological barriers to entry compared to physical modalities. Additionally, patients who do not respond to initial therapy may experience decreased motivation to begin a subsequent treatment phase, a reality physicians frequently encounter in chronic pain management. Several methodological constraints should be considered when applying these results to clinical practice. A primary limitation is that participants in the trial were not blinded to their treatment assignments. This is a common challenge in studies of physical and behavioral therapies where the nature of the intervention is inherently obvious, but it could potentially influence patient expectations and self-reported outcomes on the Oswestry Disability Index. Furthermore, the sample size was reduced due to the COVID-19 pandemic, which may have affected the statistical power to detect very small differences between the treatment arms. Despite these factors, the multisite design provides a realistic assessment of how these common conservative strategies perform, reinforcing that physical therapy is a pragmatic starting point for chronic low back pain.
References
1. Chou R, Deyo R, Friedly J, et al. Nonpharmacologic Therapies for Low Back Pain: A Systematic Review for an American College of Physicians Clinical Practice Guideline. Annals of Internal Medicine. 2017. doi:10.7326/M16-2459
2. Zhu F, Zhang M, Wang D, Hong Q, Zeng C, Chen W. Yoga compared to non-exercise or physical therapy exercise on pain, disability, and quality of life for patients with chronic low back pain: A systematic review and meta-analysis of randomized controlled trials.. PloS one. 2020. doi:10.1371/journal.pone.0238544
3. Zhang S, Gu M, Zhang T, Xu H, Mao S, Zhou W. Effects of exercise therapy on disability, mobility, and quality of life in the elderly with chronic low back pain: a systematic review and meta-analysis of randomized controlled trials. Journal of Orthopaedic Surgery and Research. 2023. doi:10.1186/s13018-023-03988-y
4. Río DR, Touche RL, Giolito G, Bonaventura SD, Grande-Alonso M, Varona ÁR. Effectiveness of biobehavioral therapeutic education in chronic low back pain intensity and disability: a systematic review. Journal of MOVE and Therapeutic Science. 2024. doi:10.37382/jomts.v6i1.1179
5. Hajihasani A, Rouhani M, Salavati M, Hedayati R, Kahlaee AH. The Influence of Cognitive Behavioral Therapy on Pain, Quality of Life, and Depression in Patients Receiving Physical Therapy for Chronic Low Back Pain: A Systematic Review.. PM & R : the journal of injury, function, and rehabilitation. 2019. doi:10.1016/j.pmrj.2018.09.029
6. Nugroho SA, Vaganesha NG, Afifudin HH. What is the effectiveness of chiropractic manipulation compared to standard physical therapy in reducing pain intensity and improving functional mobility for patients with chronic low back pain? : A Systematic Review. International journal of medical science and health research. 2025. doi:10.70070/3q1t7y20
