Abstract
Objective
To assess incidence, time-trends, and outcomes of serious infections in people with polymyalgia rheumatica (PMR) or giant cell arteritis (GCA).
Methods
We examined the 1998–2016 US National Inpatient Sample for serious infections in PMR or GCA, namely, opportunistic infections (OI), skin and soft tissue infections (SSTI), urinary tract infection (UTI), pneumonia, and sepsis/bacteremia. Multivariable-adjusted logistic regressions assessed association of the type of infection, demographics, comorbidity, and hospital characteristics with healthcare utilization and mortality.
Results
Hospitalized with serious infections, those with PMR or GCA were 2 decades older than people without PMR or GCA, and more likely to be female or white or have higher Deyo-Charlson index score or higher income. Sepsis rates in the general population, PMR, and GCA cohorts were 10.2%, 17.7%, and 18.9% in 2015–2016, respectively. Incidence rates of serious infections/100,000 NIS claims in PMR and GCA in 2015–2016 were as follows (rounded off): OI, < 1 and < 1; SSTI, 4 and 1; UTI, 4 and 1; pneumonia, 9 and 2; and sepsis, 20 and 4, respectively. Sepsis surpassed pneumonia as the most common serious infection in 2011–2012. In multivariable-adjusted analyses in the PMR cohort, sepsis, female sex, Deyo-Charlson comorbidity score ≥ 2, Medicare or Medicaid insurance, urban hospital location, and large hospital bed size were associated with significantly higher healthcare utilization and/or in-hospital mortality. Similar associations were noted in the GCA cohort.
Conclusions
Incidence of serious infections, especially sepsis, increased in both PMR and GCA cohorts over time. Interventions to improve serious infection outcomes in PMR/GCA are needed.
Key Points • PMR/GCA patients with hospitalized serious infections were 2 decades older than the general population. • Sepsis surpassed pneumonia as the commonest hospitalized serious infection in PMR/GCA in 2011–2012. • Sepsis, female sex, comorbidity, Medicare/Medicaid insurance, and urban location were associated with higher healthcare utilization and in-hospital mortality. |
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The funding body did not play any role in design, in the collection, analysis, and interpretation of data; in the writing of the manuscript; and in the decision to submit the manuscript for publication.
Funding
This study is funded by the research funds from the Division of Rheumatology at the University of Alabama at Birmingham and the resources and use of facilities at the Birmingham VA Medical Center, Birmingham, Alabama, USA.
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Mr. Cleveland had full access to all of the data in the study and takes the responsibility for the integrity of the data and accuracy of the data analysis. He was supervised by Dr. Singh, who reviewed all results. Study concept and design: Singh. Data acquisition, analysis, and interpretation of results: Singh, Cleveland. Drafting of the manuscript: Singh. Critical revision of the manuscript for important intellectual content: Singh, Cleveland. Statistical analysis: Cleveland.
Obtained funding: Singh. Administrative, technical, or material support: Singh. Study supervision: Singh.
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JAS has received consultant fees from Crealta/Horizon, Medisys, Fidia, UBM LLC, Trio health, Medscape, WebMD, Clinical Care options, Clearview healthcare partners, Putnam associates, Focus forward, Navigant consulting, Spherix, Practice Point communications, the National Institutes of Health and the American College of Rheumatology. JAS owns stock options in Amarin pharmaceuticals and Viking therapeutics. JAS is on the speaker’s bureau of Simply Speaking. JAS is a member of the executive of OMERACT, an organization that develops outcome measures in rheumatology and receives arms-length funding from 12 companies. JAS serves on the FDA Arthritis Advisory Committee. JAS is the chair of the Veterans Affairs Rheumatology Field Advisory Committee. JAS is the editor and the Director of the UAB Cochrane Musculoskeletal Group Satellite Center on Network Meta-analysis. JAS previously served as a member of the following committees: member, the American College of Rheumatology’s (ACR) Annual Meeting Planning Committee (AMPC) and Quality of Care Committees, the Chair of the ACR Meet-the-Professor, Workshop and Study Group Subcommittee and the co-chair of the ACR Criteria and Response Criteria subcommittee. DC has no conflicts to declare. There are no non-financial competing interests for any of the authors.
Ethics/IRB approval and consent to participate
The University of Alabama at Birmingham’s Institutional Review Board approved this study and all investigations were conducted in conformity with ethical principles of research (UAB X120207004). The IRB waived the need for an informed consent for this database study.
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Singh, J.A., Cleveland, J.D. Serious infections in people with polymyalgia rheumatica (PMR) or giant cell arteritis (GCA): a time-trend national US study. Clin Rheumatol 39, 3427–3438 (2020). https://doi.org/10.1007/s10067-020-05129-w
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DOI: https://doi.org/10.1007/s10067-020-05129-w