Results Preparatory stage: Evidence from literature.

Initial draft list with indicators (n = 58) indicating a predictive value for treatment outcome or persistence of back pain, categorized in domains, including the number of studies found per study design and the resulting evidential value.1. *Recommended in (inter-/) national guidelines;#Pain started age 50 years, recent trauma, constant progressive pain, history of malignancies, prolonged use of corticosteroid use, HIV, recent unexplained weight loss, structural deformity, infectious disease (CBO 2010).2. SR Systematic Review; R Randomized Clinical Trial; PC Prospective Cohort study; NR Narrative Review; n number of studies.3. I Inconclusive evidence; C Conclusive evidence; PV Predictive Value; NP No Predictive value.4. †Not included for phase 2 Delphi Study.