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Distribution of responses to items of EQ-5D descriptive system in patient sample (n = 389) and general population (n = 3552) [40]. In the patient sample there were 7 missing values for the EQ-5D items 'mobility', 'self-care', 'usual activities', 10 missing values for the item 'pain/discomfort' and 8 missing values for the item 'anxiety/depression'.
