Seminars in Arthritis and Rheumatism


Objective: To develop a multimorbidity index (MMI) based on health-related quality of life (HRQol). Methods: The index was developed in an observational RA cohort. In all, 40 morbidities recommended as core were identified using ICD-9 codes. MMIs of two types were calculated: one by enumerating morbidities (MMI.count) and the other by weighting morbidities… (More)


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