Incidence of ANCA-associated vasculitis in a UK mixed ethnicity population (original) (raw)

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1 Division of Epidemiology and Public Health, University of Nottingham,

2 Department of Rheumatology, Nottingham University Hospitals NHS Trust, Nottingham,

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2 Department of Rheumatology, Nottingham University Hospitals NHS Trust, Nottingham,

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1 Division of Epidemiology and Public Health, University of Nottingham,

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3 Department of Rheumatology, Derby Teaching Hospitals NHS Trust, Derby, UK,

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4 Department of Internal Medicine, Hospital Saint-Louis, Paris, France,

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1 Division of Epidemiology and Public Health, University of Nottingham,

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5 Department of Rheumatology, Ipswich Hospital, Ipswich and

6 Norwich Medical School, University of East Anglia, Norwich, UK

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Received:

22 December 2015

Revision received:

22 April 2016

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Fiona A. Pearce, Peter C. Lanyon, Matthew J. Grainge, Reena Shaunak, Alfred Mahr, Richard B. Hubbard, Richard A. Watts, Incidence of ANCA-associated vasculitis in a UK mixed ethnicity population, Rheumatology, Volume 55, Issue 9, September 2016, Pages 1656–1663, https://doi.org/10.1093/rheumatology/kew232
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Abstract

Objectives. We aimed to estimate the incidence of ANCA-associated vasculitis in the UK and how this varied by ethnic group.

Methods . We identified incident cases of ANCA-associated vasculitis between March 2007 and June 2013 in the Nottingham–Derby urban area from medical records using multiple sources. We derived the denominator population from the 2011 census, and we calculated incidence rate ratios using Poisson regression.

Results. Overall, we identified 107 cases of ANCA-associated vasculitis, giving an incidence of 23.1 per million person-years (95% CI: 18.9, 27.9). The incidence among the white population was 25.8 per million person-years (95% CI: 21.0, 31.3) and among the black and minority ethnic (BME) population 8.4 per million person-years (95% CI: 3.1, 18.3). After adjustment for age and sex, the difference between ethnic groups was not statistically significant (incidence rate ratio 0.7, 95% CI: 0.3, 1.5, P = 0.3).

Conclusion. Overall, the incidence of ANCA-associated vasculitis was similar to other epidemiological studies. Crude incidence rates were lower in the BME than in the white population, but this was partly explained by the older age profile among the white compared with BME population.

© The Author 2016. Published by Oxford University Press on behalf of the British Society for Rheumatology. All rights reserved. For Permissions, please email: journals.permissions@oup.com

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