{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,17]],"date-time":"2026-08-17T14:31:46Z","timestamp":1786977106458,"version":"build-2736575974"},"reference-count":48,"publisher":"Wiley","issue":"8","license":[{"start":{"date-parts":[[2023,5,8]],"date-time":"2023-05-08T00:00:00Z","timestamp":1683504000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100004359","name":"Swedish Research Council","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100004359","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["acrjournals.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Arthritis &amp; Rheumatology"],"published-print":{"date-parts":[[2023,8]]},"abstract":"<jats:sec>\n                    <jats:title>Objective<\/jats:title>\n                    <jats:p>To examine if idiopathic inflammatory myopathies (IIMs) share familial susceptibility with cancer, we estimated the familial co\u2010aggregation of these diseases.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>This Swedish population\u2010based family study with data from national registers included 8,460 first\u2010degree relatives of patients with IIM and 41,127 relatives of matched individuals without IIM. We modeled the adjusted odds ratios (ORs) of familial co\u2010aggregation of IIM and cancer using conditional logistic regressions and adjusted for sex and birth year of index individuals and their first\u2010degree relatives. We examined the associations for cancer overall and stratified by several factors of interest. We also performed exploratory analyses for specific cancer types.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>We observed no statistically significant familial associations between IIM and cancer overall. However, there was a familial association in male relative pairs of patients with dermatomyositis (adjusted OR for familial association 1.39 [95% confidence interval (95% CI) 1.15\u20131.68]). The association remained statistically significant after controlling for multiple testing. Moreover, this finding was consistent between kinships. Familial co\u2010aggregation of IIM and cancer diagnosed before 50\u2009years of age was only observed in offspring. In exploratory analyses, only the familial associations for myeloid malignancies (adjusted OR 2.27 [95% CI 1.43\u20133.60]) and liver cancer (adjusted OR 2.01 [95% CI 1.21\u20133.33]) in male relative pairs remained significant after controlling for multiple testing.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>We found little evidence of shared familial susceptibility as a major pathologic mechanism contributing to the co\u2010occurrence of IIM and cancer overall. There could be subsets of patients and cancer types for which familial factors including genetics and shared environments are of more importance, but these findings need replication.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1002\/art.42493","type":"journal-article","created":{"date-parts":[[2023,3,13]],"date-time":"2023-03-13T01:19:24Z","timestamp":1678670364000},"page":"1445-1455","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Familial\n                    <scp>Co\u2010Aggregation<\/scp>\n                    of Idiopathic Inflammatory Myopathies and Cancer: A Swedish\n                    <scp>Population\u2010Based<\/scp>\n                    Study"],"prefix":"10.1002","volume":"75","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8355-2024","authenticated-orcid":false,"given":"Weng Ian","family":"Che","sequence":"first","affiliation":[{"name":"Clinical Epidemiology Division, Department of Medicine, Solna Karolinska Institutet  Stockholm Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fredrik","family":"Baecklund","sequence":"additional","affiliation":[{"name":"Pediatric Oncology Unit, Karolinska University Hospital, and Childhood Cancer Research Unit, Department of Women's and Children's Health Karolinska Institutet  Stockholm Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Karin","family":"Hellgren","sequence":"additional","affiliation":[{"name":"Clinical Epidemiology Division and Division of Rheumatology, Department of Medicine, Solna Karolinska Institutet  Stockholm Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ralf","family":"Kuja\u2010Halkola","sequence":"additional","affiliation":[{"name":"Department of Medical Epidemiology and Biostatistics Karolinska Institutet  Stockholm 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