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J Rheumatol. 2018 Aug;45(8):1159-1166. doi: 10.3899/jrheum.171352. Epub 2018 Jun 15.

Longterm Outcomes of 188 Japanese Patients with Eosinophilic Granulomatosis with Polyangiitis.

Author information

1
From the Department of Allergy and Clinical Immunology, Chiba University Hospital; Department of Internal Medicine, Narita Red Cross Hospital; Department of Internal Medicine, Chiba Aoba Municipal Hospital; Department of Allergy and Clinical Immunology, Asahi General Hospital, Chiba; Department of Rheumatology, Dokkyo Medical University, Tochigi; Department of Rheumatology, Allergy and Clinical Immunology, National Hospital Organization Chiba-East Hospital, Chiba; Third Department of Internal Medicine, University of Yamanashi, Yamanashi; Department of Rheumatology, National Hospital Organization Shimoshizu Hospital; Department of Internal Medicine, Matsudo City Hospital; Centre for Rheumatic Diseases, Chibaken Saiseikai Narashino Hospital, Chiba, Japan.
2
A. Saku, MD, Chiba University Hospital; S. Furuta, MD, PhD, Chiba University Hospital; M. Hiraguri, MD, PhD, Narita Red Cross Hospital; K. Ikeda, MD, PhD, Chiba University Hospital; Y. Kobayashi, MD, PhD, Chiba Aoba Municipal Hospital; S.I. Kagami, MD, PhD, Asahi General Hospital; K. Kurasawa, MD, PhD, Dokkyo Medical University; R. Matsumura, MD, PhD, Chiba-East Hospital; D. Nakagomi, MD, PhD, University of Yamanashi; T. Sugiyama, MD, PhD, Shimoshizu Hospital; T. Umibe, MD, PhD, Matsudo City Hospital; N. Watanabe, MD, PhD, Chibaken Saiseikai Narashino Hospital; H. Nakajima, MD, PhD, Chiba University Hospital.
3
From the Department of Allergy and Clinical Immunology, Chiba University Hospital; Department of Internal Medicine, Narita Red Cross Hospital; Department of Internal Medicine, Chiba Aoba Municipal Hospital; Department of Allergy and Clinical Immunology, Asahi General Hospital, Chiba; Department of Rheumatology, Dokkyo Medical University, Tochigi; Department of Rheumatology, Allergy and Clinical Immunology, National Hospital Organization Chiba-East Hospital, Chiba; Third Department of Internal Medicine, University of Yamanashi, Yamanashi; Department of Rheumatology, National Hospital Organization Shimoshizu Hospital; Department of Internal Medicine, Matsudo City Hospital; Centre for Rheumatic Diseases, Chibaken Saiseikai Narashino Hospital, Chiba, Japan. shfuruta@chiba-u.jp.
4
A. Saku, MD, Chiba University Hospital; S. Furuta, MD, PhD, Chiba University Hospital; M. Hiraguri, MD, PhD, Narita Red Cross Hospital; K. Ikeda, MD, PhD, Chiba University Hospital; Y. Kobayashi, MD, PhD, Chiba Aoba Municipal Hospital; S.I. Kagami, MD, PhD, Asahi General Hospital; K. Kurasawa, MD, PhD, Dokkyo Medical University; R. Matsumura, MD, PhD, Chiba-East Hospital; D. Nakagomi, MD, PhD, University of Yamanashi; T. Sugiyama, MD, PhD, Shimoshizu Hospital; T. Umibe, MD, PhD, Matsudo City Hospital; N. Watanabe, MD, PhD, Chibaken Saiseikai Narashino Hospital; H. Nakajima, MD, PhD, Chiba University Hospital. shfuruta@chiba-u.jp.

Abstract

OBJECTIVE:

Patients with eosinophilic granulomatosis with polyangiitis (EGPA) frequently experience relapses, which lead to cumulative organ damage. In this retrospective observational study, we aimed to reveal the risk factors for relapse in EGPA.

METHODS:

A total of 188 Japanese patients with EGPA diagnosed between 1996 and 2015 were identified from medical records in 10 hospitals. The diagnosis was based on the American College of Rheumatology 1990 criteria or Lanham's criteria. Baseline characteristics, treatments, asthma exacerbation, and relapses were evaluated by retrospective chart review.

RESULTS:

The median followup period was 56 months. The median age at disease onset was 59.7 years. At the disease onset, 95.2% of the patients had a history of bronchial asthma and 44.7% were positive for antineutrophil cytoplasmic antibodies. The cumulative survival and relapse-free survival rates at 5 years were 89.6% and 64.0%, respectively. Multivariate analysis with 2 models, proportional hazards, and competing risk models, was performed to identify the factors associated with relapse. The proportional hazards model identified azathioprine (AZA) maintenance therapy and high eosinophil counts at onset as independent factors with lower relapse risks, and high immunoglobulin E (IgE) levels at onset as a risk factor for relapse. The competing risk model identified no statistically significant factors.

CONCLUSION:

Although potential benefit of AZA maintenance therapy in preventing relapse of EGPA was suggested by the proportional hazards model, there was a discrepancy in the results between the models. Eosinophil counts and IgE levels at onset were also identified as candidates of factors associated with relapse in EGPA.

KEYWORDS:

ANTINEUTROPHIL CYTOPLASMIC ANTIBODIES–ASSOCIATED VASCULITIS; EOSINOPHILIC GRANULOMATOSIS WITH POLYANGIITIS; JAPAN; OUTCOME; RELAPSE

PMID:
29907668
DOI:
10.3899/jrheum.171352
[Indexed for MEDLINE]

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