{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,3]],"date-time":"2026-10-03T06:50:41Z","timestamp":1791010241204,"version":"4.1.0"},"reference-count":50,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2007,12,28]],"date-time":"2007-12-28T00:00:00Z","timestamp":1198800000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Arthritis &amp; Rheumatism"],"published-print":{"date-parts":[[2008,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Objective<\/jats:title><jats:p>The etiology of Wegener's granulomatosis (WG) supposedly involves interplay between genetic susceptibility and environmental triggers. However, little is known about whether WG actually clusters in families. Information on the degree of familial aggregation in WG is of clinical relevance, because patients with WG often want to know whether their diagnosis puts their closest relatives at increased risk of the disease. The aim of this study was to investigate the risk of WG in relatives of patients with WG.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Using Swedish nationwide registers on morbidity, family structure, and vital status, we compared the occurrence of WG (register\u2010based plus chart review) among 6,670 first\u2010degree relatives and 428 spouses of 1,944 Swedish patients with WG with the occurrence among 68,994 first\u2010degree relatives and 4,812 spouses of 19,655 control subjects from the general population. Relative risks were estimated using the Cox proportional hazards regression model.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Two of the 6,670 first\u2010degree relatives of patients with WG and 13 of the 68,994 first\u2010degree relatives of their population controls had WG, resulting in a relative risk of 1.56 (95% confidence interval 0.35\u20136.90). None of the 428 spouses of patients had WG.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>In absolute terms, the occurrence of WG among close biologic and nonbiologic relatives of patients with WG is low. In terms of relative risk, our results provide strong evidence against a pronounced increase in familial risk such as that noted for systemic lupus erythematosus, irritable bowel disease, and multiple sclerosis but are compatible with familial aggregation of a magnitude similar to that for rheumatoid arthritis.<\/jats:p><\/jats:sec>","DOI":"10.1002\/art.23157","type":"journal-article","created":{"date-parts":[[2007,12,28]],"date-time":"2007-12-28T20:50:26Z","timestamp":1198875026000},"page":"302-307","source":"Crossref","is-referenced-by-count":65,"title":["Risks and relative risks of Wegener's granulomatosis among close relatives of patients with the 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