Verhagen, A.P.

study patient treatment trial outcome group neck pain review disability result effect score therapy quality difference intervention evidence month complaint follow-up exercise factor questionnaire table analysis scale population signi baseline health measure participant hip oa spine model headache research criteria control practice ficant recovery placebo article measurement shoulder netherland variable pain intensity signi ficant differences reference assessment index randomized cohort number injury osteoarthritis measurement properties outcome measures characteristic intensity improvement duration method prognostic factors association journal prognostic therapist point disorder injection activity dropout speci change information value training