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Information on BCG vaccination was extracted from the Quebec BCG Vaccination Registry. Lymphomas cases were individuals who had \u22652 health encounters, medical visits or hospitalizations, for lymphoma within 2\u00a0months or who were identified through the Quebec Tumor Registry. Cox proportional hazard regression was used to estimate hazard ratios (HRs) and 95% confidence interval (CI), adjusting for potential confounders.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>A total of 178\u00a0335 (46.0%) subjects were BCG\u2010vaccinated, and 1478 (0.38%) cases of lymphomas were ascertained. Amongst them, 922 were identified as NHL and 421 as HL. After adjustment, no association was observed between BCG vaccination and either lymphoma (any type) (HR\u00a0=\u00a01.03, 95% CI: 0.96\u20131.11) or NHL (HR\u00a0=\u00a00.99, 95% CI: 0.86\u20131.13). For HL, nonproportional hazards were observed. Before the age of 18, the risk of HL was elevated amongst vaccinated individuals (HR\u00a0=\u00a02.26, 95% CI: 1.39\u20133.69). However after 18\u00a0years of age, no association was found (HR\u00a0=\u00a00.93, 95% CI: 0.75\u20131.15).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>Bacillus Calmette\u2013Gu\u00e9rin vaccination may increase the risk of HL before 18\u00a0years of age, but residual confounding cannot entirely be excluded. Given the benefits of BCG vaccination, these results need to be reproduced in other populations before firm conclusions can be drawn.<\/jats:p><\/jats:sec>","DOI":"10.1111\/joim.12965","type":"journal-article","created":{"date-parts":[[2019,7,30]],"date-time":"2019-07-30T20:02:56Z","timestamp":1564516976000},"page":"583-595","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Association between Bacillus Calmette\u2013Gu\u00e9rin vaccination and lymphoma: a population\u2010based birth cohort study"],"prefix":"10.1111","volume":"286","author":[{"given":"C.","family":"Salmon","sequence":"first","affiliation":[{"name":"Epidemiology and Biostatistics Unit, Centre Armand\u2010Frappier Sant\u00e9 Biotechnologie Institut National de la Recherche Scientifique (INRS), Universit\u00e9 du Qu\u00e9bec Laval QC Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"F.","family":"Conus","sequence":"additional","affiliation":[{"name":"Epidemiology and Biostatistics Unit, Centre Armand\u2010Frappier Sant\u00e9 Biotechnologie Institut National de la Recherche Scientifique (INRS), Universit\u00e9 du Qu\u00e9bec Laval QC Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4196-3773","authenticated-orcid":false,"given":"M.\u2010\u00c9.","family":"Parent","sequence":"additional","affiliation":[{"name":"Epidemiology and Biostatistics Unit, Centre Armand\u2010Frappier Sant\u00e9 Biotechnologie Institut National de la Recherche Scientifique (INRS), Universit\u00e9 du Qu\u00e9bec Laval QC Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8314-9497","authenticated-orcid":false,"given":"A.","family":"Benedetti","sequence":"additional","affiliation":[{"name":"Respiratory Epidemiology and Clinical Research Unit Research Institute of the McGill University Health Centre Montreal QC Canada"},{"name":"Department of Epidemiology, Biostatistics and Occupational Health, Faculty of Medicine McGill University Montreal QC Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5215-8086","authenticated-orcid":false,"given":"M.\u2010C.","family":"Rousseau","sequence":"additional","affiliation":[{"name":"Epidemiology and Biostatistics Unit, Centre Armand\u2010Frappier Sant\u00e9 Biotechnologie Institut National de la Recherche Scientifique (INRS), Universit\u00e9 du Qu\u00e9bec Laval QC Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2019,9,9]]},"reference":[{"key":"e_1_2_9_2_1","unstructured":"International Agency for Research on Cancer. 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