Affiliation:
1. Department of Neurology
2. Department of Health Sciences Research
3. Division of Rheumatology, Department of Medicine, Mayo Clinic, Rochester, MN, USA
Abstract
Abstract
Objective
To evaluate survival and associated comorbidities in inclusion body myositis (IBM) in a population-based, case-control study.
Methods
We utilized the expanded Rochester Epidemiology Project medical records-linkage system, including 27 counties in Minnesota and Wisconsin, to identify patients with IBM, other inflammatory myopathies (IIM), and age/sex-matched population-controls. We compared the frequency of various comorbidities and survival among groups.
Results
We identified 50 IBM patients, 65 IIM controls and 294 population controls. Dysphagia was most common in IBM (64%) patients. The frequency of neurodegenerative disorders (dementia/parkinsonism) and solid cancers was not different between groups. Rheumatoid arthritis was the most common rheumatic disease in all groups. A total of 36% of IBM patients had a peripheral neuropathy, 6% had Sjögren’s syndrome and 10% had a haematologic malignancy. T-cell large granular lymphocytic leukaemia was only observed in the IBM group. None of the IBM patients had hepatitis B or C, or HIV. IBM patients were 2.7 times more likely to have peripheral neuropathy, 6.2 times more likely to have Sjögren’s syndrome and 3.9 times more likely to have a haematologic malignancy than population controls. IBM was associated with increased mortality, with a 10-year survival of 36% from index, compared with 67% in IIM and 59% in population controls. Respiratory failure or pneumonia (44%) was the most common cause of death.
Conclusions
IBM is associated with lower survival, and higher frequency of peripheral neuropathy, Sjögren’s syndrome and haematologic malignancies than the general population. Close monitoring of IBM-related complications is warranted.
Funder
Center for Clinical and Translational Sciences
Mayo Clinic
National Institute on Aging of the National Institutes of Health
Publisher
Oxford University Press (OUP)
Subject
Pharmacology (medical),Rheumatology
Cited by
19 articles.
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