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Wegener's granulomatosis--increased incidence or increased recognition?
D M Carruthers1, R A Watts, D P Symmons
1Department of Rheumatology, Norfolk and Norwich Hospital, University of Manchester, UK.
British Journal of Rheumatology
|February 1, 1996
Summary
The annual incidence of Wegener's granulomatosis (WG) in Norfolk, UK, is 8.5 per million adults, higher than previously reported. Disease presentation in Norfolk mirrors that in major centers, with a possible winter symptom onset.
Area of Science:
- Rheumatology
- Epidemiology
Background:
- Wegener's granulomatosis (WG), a rare autoimmune vasculitis, requires accurate incidence data for public health planning.
- Previous incidence studies for WG have limitations due to population definition and ascertainment methods.
Purpose of the Study:
- To determine the annual incidence of WG in a well-defined UK population.
- To compare the clinical features and seasonal onset of WG in Norfolk with data from tertiary care centers in the UK and USA.
Main Methods:
- Prospective population-based study of WG cases presenting to a district general hospital.
- Defined population of 515,000 in Norfolk, UK, from 1988 to 1993.
- Analysis of clinical presentation and symptom onset timing.
Main Results:
- The annual incidence of WG in Norfolk adults was calculated at 8.5 per million (95% CI 5.2-12.9).
- This incidence is higher than previously published figures for WG.
- The clinical spectrum observed in Norfolk was comparable to that reported from UK and US tertiary centers, with a trend towards higher symptom onset in winter.
Conclusions:
- This study provides the first population-based incidence data for WG in a defined UK region.
- The findings suggest WG incidence may be underestimated in prior studies.
- Clinical presentation is consistent across different healthcare settings, and a seasonal pattern in symptom onset warrants further investigation.