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Published in: Cancer Immunology, Immunotherapy 6/2019

01-06-2019 | Checkpoint Inhibitors | Original Article

Pre-existing autoimmune disease and the risk of immune-related adverse events among patients receiving checkpoint inhibitors for cancer

Authors: Kenneth L. Kehl, Shihao Yang, Mark M. Awad, Nathan Palmer, Isaac S. Kohane, Deborah Schrag

Published in: Cancer Immunology, Immunotherapy | Issue 6/2019

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Abstract

Introduction

Patients with pre-existing autoimmune diseases have been excluded from clinical trials of immune checkpoint inhibitors (ICIs) for cancer. Real-world evidence is necessary to understand ICI safety in this population.

Methods

Patients treated with ICIs from 2011 to 2017 were identified using data from a large health insurer. Outcomes included time to (1) any hospitalization; (2) any hospitalization with an irAE diagnosis; and (3) outpatient corticosteroid treatment. The key exposure was pre-existing autoimmune disease, ascertained within 12 months before starting ICI treatment, and defined either by strict criteria (one inpatient or two outpatient claims at least 30 days apart) or relaxed criteria only (any claim, without meeting strict criteria).

Results

Of 4438 ICI-treated patients, pre-existing autoimmune disease was present among 179 (4%) by strict criteria, and another 283 (6%) by relaxed criteria only. In multivariable models, pre-existing autoimmune disease by strict criteria was not associated with all-cause hospitalization (HR 1.27, 95% CI 0.998–1.62), but it was associated with hospitalization with an irAE diagnosis (HR 1.81, 95% CI 1.21–2.71) and with corticosteroid treatment (HR 1.93, 95% CI 1.35–2.76). Similarly, pre-existing autoimmune disease by relaxed criteria only was not associated with all-cause hospitalization (HR 1.11, 95% CI 0.91–1.34), but was associated with hospitalization with an irAE diagnosis (HR 1.46, 95% CI 1.06–2.01) and corticosteroid treatment (HR 1.46, 95% CI 1.13–1.88).

Conclusion

Pre-existing autoimmune disease was not associated with time to any hospitalization after initiating ICI therapy, but it was associated with a modest increase in hospitalizations with irAE diagnoses and with corticosteroid treatment.
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Metadata
Title
Pre-existing autoimmune disease and the risk of immune-related adverse events among patients receiving checkpoint inhibitors for cancer
Authors
Kenneth L. Kehl
Shihao Yang
Mark M. Awad
Nathan Palmer
Isaac S. Kohane
Deborah Schrag
Publication date
01-06-2019
Publisher
Springer Berlin Heidelberg
Published in
Cancer Immunology, Immunotherapy / Issue 6/2019
Print ISSN: 0340-7004
Electronic ISSN: 1432-0851
DOI
https://doi.org/10.1007/s00262-019-02321-z

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