Stratified Care for Low Back Pain

Original Editor - Rachael Lowe

Top Contributors - Tarina van der Stockt, Simisola Ajeyalemi, Rachael Lowe and Alexander Chan  

Introduction

Stratified care is the matching of subgroups of patients to specific treatments. A major goal over several years has been to divide people with LBP into homogeneous populations or 'subgroups' of similar characteristics in an effort to improve patient outcomes[1]. Sub-grouping may also help reduce inefficient variability in treatment and provide a helpful communication tool. In the physiotherapy profession several classification approaches that focus on directing specific treatment have emerged. Treatment of patients based on sub-grouping results in better outcomes than treatment based on clinical guidelines[2].  However, currently there is no clear consensus as to which classification system to use.

Karayannis et al[3] report that in physiotherapy there is low use of classification schemes despite evidence that treatment of patients based on sub-grouping results in better outcomes than treatment based on clinical guidelines. The prevalence of relatively low use of these classification schemes could be explained by unfamiliarity with these approaches; low perceived value in classification oriented assessment; inability to choose between classification schemes; or a preference for other assessment methods. An alternative reason for the modest implementation of the classification approach may be that assessment schemes do not adequately integrate the multiple dimensions that can contribute to, or perpetuate LBP.

Steps to Stratification

Usual management of LBP is:

  1. Diagnostic triage by first contact clinical (physio, doctor) to rule out serious spinal pathology such as inflammatory disorders, metastases, infection or specific conditions such as radiculopathy, caudal equina syndrome
  2. After ruling these out a diagnosis of “non-specific” (simple or mechanical) LBP is given and the following interventions are recommended[4]:
    1. advice and analgesia
    2. other interventions - exercise, manual therapy, acupuncture

Generally, decisions about the care for patients with non-specific LBP is made on the intuition from the first-line practitioner, this is considered to be inefficient and leads to inconsistent treatment.[5] Alternatively, when all patients with non-specific LBP are referred for treatment the cost is very high and might be "unnecessary, impractical, and inefficient".[5]

Stratified care has been suggested as an appropriate way to manage LBP[6].  Although not yet in clinical guidelines stratified care is a way of targeting treatment to subgroups of patients based on characteristics.

Stratification of Care

In 2012 Karayannis, Jull and Hodges[3] identified a group of five dominant movement-based schemes and grouped them into two dominant movement paradigms:

  1. Loading strategies aimed at eliciting a phenomenon of centralisation of symptoms
  2. Modified movement strategies targeted towards documenting the movement impairments associated with the pain state.

In 2015 Foster et al[6] identified 3 models of Stratified Care (approaches to sub-grouping low back pain patients)

  1. Patient prognosis - matching treatment to patient's risk of poor outcome (i.e. likelihood of persistent pain and disability). This approach allows us to make early decisions about amount of therapy and broad direction of therapy a patient receives. Proven to be both clinically and cost effective. Low risk patients are not over treated or medicalised and supported to self manage with advice, reassurance, medication.  At risk patients get access to the right person early on with evidence based physiotherapy and enhanced comprehensive care including is given to complex cases - psychologically informed physiotherapy with enhanced skills and more time.  Examples of this are:
    • Orebro Screening Tool
    • Chronic Pain Risk Prognostic Screen
    • STarT Back Approach and Matched Treatments
      • This tool is validated for non-specific LBP
      • Using the STarT Back approach individuals with back pain may be categorised as:[5]
        1. Low risk – These patients can be taught self management with the possibility of discharge after 1 session. Medication management is often part of the treatment. Prognosis is good for these patients. They have a low level of disability and are able to continue with daily activities. Further testing/imaging not likely necessary for management. These may be up to 56% of all LBP patients that present to the doctor.
        2. Medium risk - Physiotherapy management is utilised to decrease symptoms, levels of pain and disability/function. This may consist of exercise with or without manual therapy. Typically patients have up to 6 physiotherapy treatment sessions in the UK. This number may vary based on clinical setting or health care system/location of treatment.
        3. High risk – These patients struggle with persistent pain and disability. Psychosocial barriers to recovery exist and typically include depression, anxiety, and/or fear avoidant behaviours. Physiotherapy management and management of psychosocial obstacles is key with emphasis on addressing psychological contributions. In some cases, patients may work with a psychologist.
  2. Responsiveness to treatment - matching treatments to patients who would benefit from that particular treatment. This approach is about identifying categories of interventions that have evidence for their effectiveness such as manual therapy and exercise, specific directional exercises, stabilisation exercises, traction.  Most of the evidence is in acute and sub-acute LBP.
  3. Underlying mechanisms - matching treatment to pathology or diagnosis. Thus matching treatment to mechanisms that drive pain and disability (pathology, pain mechanisms, provocative behaviours, negative thoughts/distress). It has been tested and makes sense in chronic back pain patients:

Conclusion

Emerging evidence indicates that stratified care of low back pain (LBP) may result in better clinical outcome and reduced healthcare costs, compared to usual care [5]There are overlaps between these three different approaches, a perfect sub-grouping approach would include all of these approaches. Hancock[6] suggests that the STarT Back approach and/or treatment based approach is appropriate for acute/subacute non-specific LBP unless there is no recovery, in that case the cognitive functional therapy approach should be considered whilst the cognitive functional therapy approach makes most sense in chronic LBP. STarT back tool can also be used but minimal care group is less likely to be effective. These models don’t replace clinical reasoning or experience but should be explored judiciously in clinical practice in appropriate settings[6] 

Resources

References

  1. Cherkin D, Kovacs FM, Croft P, Borkan J, Foster NE, Oberg B, Urrutia G, Zamora J: The ninth international forum for primary care research on low back pain. Spine (Phila Pa 1976) 2009, 34:304–307.
  2. Fritz JM, Delitto A, Erhard RE: Comparison of classification-based physical therapy with therapy based on clinical practice guidelines for patients with acute low back pain: a randomized clinical trial. Spine (Phila Pa 1976) 2003, 28:1363–1371
  3. 3.0 3.1 Nicholas Karayannis, Gwendolen Jull, Paul Hodges. Physiotherapy movement based classification approaches to low back pain: comparison of subgroups through review and developer/expert survey. BMC Musculoskeletal Disorders, December 2012, 13:24
  4. Low back pain: Early management of persistent non-specific low back pain. NICE guidelines [CG88], May 2009
  5. 5.0 5.1 5.2 5.3 Hill JC, Whitehurst DG, Lewis M, Bryan S, Dunn KM, Foster NE, Konstantinou K, Main CJ, Mason E, Somerville S, Sowden G. Comparison of stratified primary care management for low back pain with current best practice (STarT Back): a randomised controlled trial. The Lancet. 2011 Oct 29;378(9802):1560-71. Available from: https://www.sciencedirect.com/science/article/pii/S0140673611609379 [Accessed 20 Feb 2018]
  6. 6.0 6.1 6.2 6.3 Foster N.E., Hill J.C., O'Sullivan P.B., Childs J.D., Hancock M.J. Stratified models of care for low back pain. WCPT Congress Singapore, May 2015
  7. Cheryl Hefford McKenzie classification of mechanical spinal pain:Profile of syndromes and directions of preference. Manual Therapy, 2008, 13:75–81.
  8. McKenzie R: Low back pain. N Z Med J 1987, 100:428–429.
  9. Helen Clare, Roger Adams, Chris G Maher. A systematic review of efficacy of McKenzie therapy for spinal pain. Australian Journal of Physiotherapy, 2004, 50(4):209-16
  10. Delitto A, Erhard RE, Bowling RW, DeRosa CP, Greathouse DG: A treatment-based classification approach to low back syndrome: identifying and staging patients for conservative treatment. Phys Ther 1995, 75:470–489.
  11. T. Petersen, M. Laslett, H. Thorsen, C. Manniche,fckLRC. Ekdahl, and S. Jacobsen. Diagnostic classification of non-specific low back pain. A new system integrating patho-anatomic and clinical categories. Physiotherapy Theory and Practice, 19: 213-237, 2003
  12. Tom Petersen. Non-specific Low Back Pain Classification and treatment. Lund University, 2003.
  13. Maluf KS, Sahrmann SA, Van Dillen LR: Use of a classification system to guide nonsurgical management of a patient with chronic low back pain. Phys Ther 2000, 80:1097–1111.
  14. O'Sullivan PB: Lumbar segmental 'instability': clinical presentation and specific stabilizing exercise management. Man Ther 2000, 5:2–12.
  15. Hahne AJ, Ford JJ, Surkitt LD, Richards MC, Chan AYP, Thompson SL, et al. Specific treatment of problems of the spine (STOPS): design of a randomised controlled trial comparing specific physiotherapy versus advice for people with subacute low back disorders. BMC Musculoskeletal Disorders. 2011;12:104.
  16. Ford JJ, Hahne AJ, Surkitt LD, Chan AYP, Richards MC, Slater SL, Hinman RS, Pizzari T, Davidson M and Taylor NF. Individualised physiotherapy as an adjunct to guideline-based advice for low back disorders in primary care: a randomised controlled trial. Br J Sports Med. 2015
  17. O'Sullivan, P. and Lin, I. Acute low back pain Beyond drug therapies. Pain Management Today, 2014, 1(1):8-14
  18. K Vibe Fersum, P O’Sullivan,2 JS Skouen, A Smith, and A Kvåle1. Efficacy of classification-based cognitive functional therapy in patients with non-specific chronic low back pain: A randomized controlled trial. Eur J Pain. 2013 Jul; 17(6): 916–928.