title: Each measure of patient-reported change provides useful information and is susceptible to bias: the need to combine methods to assess their relative validity.
authors: Pythia T
authors: PT
authors: Nieuwkerk
authors: Mirjam A G
authors: MA
authors: Sprangers
mesh_terms: D000203:Activities of Daily Living; D006801:Humans; D017060:Patient Satisfaction; D011788:Quality of Life; D016032:Randomized Controlled Trials as Topic; D015203:Reproducibility of Results; D012216:Rheumatic Diseases / Q000503:physiopathology / Q000534:rehabilitation*; D018434:Sickness Impact Profile; D016896:Treatment Outcome