Article
Phenotyping Healthcare Use 2-3 Decades Before the First Multiple Sclerosis Demyelinating Event.
Annals of clinical and translational neurology - 1 Aug 2025
Tremlett Helen, Everett Karl, Maxwell Colleen J, Zhu Feng, Asaf Ayesha, Li Ping, McKay Kyla A, Zhao Yinshan, Marrie Ruth Ann
Abstract excerpt
OBJECTIVE: Phenotype hospital, physician, and emergency department (ED) visits by diagnoses and specialty up to 29 years pre-multiple sclerosis (MS) onset versus a matched population without MS. METHODS: We identified people with MS (PwMS) using population-based administrative data from Ontario, Canada (1991-2020). The first MS/demyelinating diagnostic code defined MS onset (the index date). Annual rates of...
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