Fig. 5

Type and frequency (number of studies) of the different assessment methods used for every pain related and physiological outcome. Note. 6MWT = Six-minute walking test; BPI = Brief Pain Inventory ; CSQ = Coping Strategies Questionnaire ; FFbHR = Functional Ability Questionnaire for the measurement of back pain-related disability ; MPQ = McGill Pain Questionnaire ; MPI = Multi-Dimension Pain Inventory ; NRS = Numeric Rating Scale ; PCS = Pain Catastrophizing Scale ; PDI = Pain Disability Index ; PPT = Pressure Point Threshold ; QST = Quantitative Sensory Testing ; RMDQ = Roland Morris Disability Questionnaire ; SF-36 = Short Form 36 (for physical functioning) ; TSK = Tampa Scale for Kinesiophobia ; VAS = Visual Analogic Scale