The uncomfortable truth about preventing chronic low back pain
- Michele Curatolo
- 2 days ago
- 3 min read
Preventing acute low back pain from becoming chronic is one of the most important and most elusive goals in musculoskeletal medicine. The early phase of back pain is theoretically the moment of greatest opportunity: symptoms may be still biologically malleable, fear and avoidance patterns have not yet solidified, and disability trajectories could be influenced. How can we accomplish the goal of preventing acute pain from becoming chronic, and how successful are we?
What we are trying to prevent chronicity, and what we have learned
Clinicians rely on three categories of early intervention. Each has a reasonable rationale.
Medications
Medications such as NSAIDs and muscle relaxants target nociceptive input and can achieve short‑term symptom relief. They can reduce pain intensity, but they do not change long‑term outcomes. Their role is comfort, not prevention.
Physical therapy and spinal manipulation
Physical therapy, exercise‑based rehabilitation, and spinal manipulation aim to restore mobility, strengthen the back muscles, and improve movement confidence. These approaches can help some patients feel and function better. But across clinical trials, their ability to prevent chronic low back pain is limited.
Physical therapy, and in general physical activity, support general health and should be endorsed (read more here). However, effect sizes in preventing chronic pain are consistently small, meaning that most patients experience minimal or no long‑term benefit.
Psychological and behavioral interventions
Cognitive behavioral therapy, pain coping skills training, graded activity, and other psychological approaches target fear, catastrophizing, avoidance, and maladaptive beliefs, all of which are associated with chronicity. These interventions can reduce disability and improve wellbeing. But again, the preventive effect is modest, and many patients derive little or no benefit.
Across all three domains, the pattern is the same:
We can help some patients, but we cannot reliably change the trajectory for most.
A recent study adds important information
A recent large randomized clinical trial, the PACBACK study, illustrates this reality. The trial compared guideline‑based medical care, spinal manipulation, clinician‑supported biopsychosocial self‑management, and a combination of manipulation plus self‑management in 1,000 adults with acute or subacute low back pain at moderate or high risk of chronicity.
Guideline‑based medical care |
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Spinal manipulation therapy |
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Supported self‑management |
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The main findings:
Supported self‑management produced a small but statistically significant improvement in disability. The effect when compared to medical care was small: 1.1-1.2 Roland-Morris Disability Questionnaire points better than medical care (the range is 0-24). The responder analysis of the single groups showed that 67% of patients receiving supported self‑management achieved ≥50% disability reduction vs 54% with medical care. Importantly, pain intensity was not reduced as compared to medical care.
Spinal manipulation showed no significant benefit for disability and pain intensity as compared with medical care.
Adding manipulation to self‑management did not enhance outcomes.
Pain intensity — the outcome patients care about most — did not differ across groups. All groups had a reduction in pain intensity of about 2 points on a 0-10 scale, but this can be attributed to the natural course of acute low back pain.
Why the effects are so small
If our interventions were effectively targeting the mechanisms that drive chronic low back pain — neuroimmune activation at nociceptor level, central sensitization, maladaptive learning, affective amplification — we would expect:
Larger effect sizes
Meaningful reductions in pain
Lower rates of chronicity
We see none of these.
Instead, we see:
Small functional gains
No change in pain
High rates of progression to chronic pain
This tells us something important:
Our current treatments do not meaningfully address the biological and psychosocial mechanisms responsible for the transition from acute to chronic pain.
Supported self‑management is valuable, but its effect is modest, and it does not reduce pain. The same is true for physical therapy, manipulation, CBT, and most early interventions we offer.
Where this leaves clinicians
An encouraging message:
Most people with acute low back pain get better on their own.
This is reflected by the reduction in disability and pain observed in all groups in the PACBACK trial, and in virtually all studies on acute low back pain. Health professionals should reassure patients and avoid unnecessary diagnostics and over treating. Read about the management of acute low back pain here.
Set expectations realistically
Disability may improve; pain may not. The goal is not to dismiss what we have; it is to be clear‑eyed about its limits. The PACBACK trial reinforces what the broader literature has shown for years: our early interventions help a little, but not enough, and the path to preventing chronic low back pain will require a deeper understanding of the mechanisms that actually drive it.
