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. 2014 May;22(2):59–74. doi: 10.1179/2042618613Y.0000000041

Table 1. Classification of outcome measures and Cochrane Collaboration Back Review Group (CCBRG) levels of evidence for evaluating interventions46,47.

Outcome measures Validated assessment tools
Pain Visual Analogue Scale or Numerical Pain Rating Scale
Functional disabilities Oswestry Disability Index, Roland Morris Disability Questionnaire, Fear Avoidance Belief Questionnaire, Disability Rating Index, or Patient Specific Function Scale
Overall-health improvement Short form health survey
Quality of life Patient Satisfaction with Care, Modified Zung Self-Rated Depression Score and State Trait Anxiety Inventory, return to work, sick leave, and medication use, adverse effects
Strength of evidence Conditions description
Strong Consistent findings from multiple ‘high quality trials’ = level A
Moderate Consistent findings among multiple ‘low quality trials’ corresponding to moderate quality in this systematic review = Level B, and/or one level A
Limited One level B
Conflicting Inconsistent findings among multiple trials
No evidence No trials