Optimize Low Back Pain

The study uses a sequential multiple randomization (SMART) design. The study will compare the effectiveness of common first-line treatments for chronic LBP: PT or CBT. Initial treatment will be 8 weeks duration with re-evaluation at 10-weeks after enrollment to allow time to complete treatment. At the 10-week assessment researchers will examine if the patient has responded to initial treatment using a patient-centered, validated definition of successful response based on 50% improvement in the Oswestry Disability Index (ODI). Patients who are responders to initial treatment will receive up to 2 additional sessions of the same treatment to assist transition to self-management. Non-responders will be re-randomized to a second treatment strategy of either switching to the other initial treatment (i.e., patients receiving PT switch to CBT or vice versa), or mindfulness. The second treatment phase is also 8 weeks in duration. Additional follow-ups occur 26- and 52 weeks after enrollment. The study has two co-primary outcomes; function and pain. The investigators will use the ODI, a well-validated, reliable and responsive patient-reported measure of LBP-related function recommended by the NIH Back Pain Task Force. The investigators will assess pain intensity with 0-10 ratings ('0' indicating no pain and '10' worst imaginable pain). Separate ratings are made for current, worst and best pain over the past 24 hours with an average computed to represent pain intensity. Secondary outcomes will assess dimensions of quality of life, work and healthcare utilization.