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Proportion of Engage and usual-care groups meeting criteria for meaningful change.
Note. WOMAC–PF = Physical Function subscale for the Western Ontario and McMasters Universities Osteoarthritis Index. Meaningful change for the Patient Global Impression of Change scale: rating of very much improved or much improved; Brief Pain Inventory and Brief Fatigue Inventory: 30% improvement from baseline; WOMAC–PF: 17% improvement from baseline.
