{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,17]],"date-time":"2026-10-17T15:33:12Z","timestamp":1792251192450,"version":"4.4.0"},"reference-count":25,"publisher":"BMJ","license":[{"start":{"date-parts":[[2023,9,6]],"date-time":"2023-09-06T00:00:00Z","timestamp":1693958400000},"content-version":"unspecified","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"funder":[{"DOI":"10.13039\/100002129","name":"Heart Foundation","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100002129","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["BMJ"],"accepted":{"date-parts":[[2023,8,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Objective<\/jats:title>\n                    <jats:p>To study the influence of concomitant use of hormonal contraception and non-steroidal anti-inflammatory drugs (NSAIDs) on the risk of venous thromboembolism.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Design<\/jats:title>\n                    <jats:p>Nationwide cohort study.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Setting<\/jats:title>\n                    <jats:p>Denmark through national registries.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Participants<\/jats:title>\n                    <jats:p>All 15-49 year old women living in Denmark between 1996 and 2017 with no medical history of any venous or arterial thrombotic event, cancer, thrombophilia, hysterectomy, bilateral oophorectomy, sterilisation, or infertility treatment (n=2\u2009029\u2009065).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Main outcome measure<\/jats:title>\n                    <jats:p>A first time discharge diagnosis of lower limb deep venous thrombosis or pulmonary embolism.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>Among 2.0 million women followed for 21.0 million person years, 8710 venous thromboembolic events occurred. Compared with non-use of NSAIDs, use of NSAIDs was associated with an adjusted incidence rate ratio of venous thromboembolism of 7.2 (95% confidence interval 6.0 to 8.5) in women not using hormonal contraception, 11.0 (9.6 to 12.6) in women using high risk hormonal contraception, 7.9 (5.9 to 10.6) in those using medium risk hormonal contraception, and 4.5 (2.6 to 8.1) in users of low\/no risk hormonal contraception. The corresponding numbers of extra venous thromboembolic events per 100\u2009000 women over the first week of NSAID treatment compared with non-use of NSAIDs were 4 (3 to 5) in women not using hormonal contraception, 23 (19 to 27) in women using high risk hormonal contraception, 11 (7 to 15) in those using medium risk hormonal contraception, and 3 (0 to 5) in users of low\/no risk hormonal contraception.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>NSAID use was positively associated with the development of venous thromboembolism in women of reproductive age. The number of extra venous thromboembolic events with NSAID use compared with non-use was significantly larger with concomitant use of high\/medium risk hormonal contraception compared with concomitant use of low\/no risk hormonal contraception. Women needing both hormonal contraception and regular use of NSAIDs should be advised accordingly.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1136\/bmj-2022-074450","type":"journal-article","created":{"date-parts":[[2023,9,6]],"date-time":"2023-09-06T20:00:28Z","timestamp":1694030428000},"page":"e074450","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":34,"title":["Venous thromboembolism with use of hormonal contraception and non-steroidal anti-inflammatory drugs: nationwide cohort study"],"prefix":"10.1136","volume":"382","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4549-8271","authenticated-orcid":false,"given":"Amani","family":"Meaidi","sequence":"first","affiliation":[{"name":"Department of Gynecology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark"},{"name":"Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Annamaria","family":"Mascolo","sequence":"additional","affiliation":[{"name":"Department of Experimental Medicine, Section of Pharmacology \u201cL. Donatelli,\u201d University of Campania \u2018L. Vanvitelli\u2019, Naples, Italy"},{"name":"Campania Regional Centre for Pharmacovigilance and Pharmacoepidemiology, Naples, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maurizio","family":"Sessa","sequence":"additional","affiliation":[{"name":"Department of Drug Design and Pharmacology, University of Copenhagen, Copenhagen, Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anne Pernille","family":"Toft-Petersen","sequence":"additional","affiliation":[{"name":"Department of Clinical Medicine, Aalborg University, Aalborg, Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Regitze","family":"Skals","sequence":"additional","affiliation":[{"name":"Unit of Clinical Biostatistics, Aalborg University Hospital, Aalborg, Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Thomas Alexander","family":"Gerds","sequence":"additional","affiliation":[{"name":"Department of Public Health, Section of Biostatistics, University of Copenhagen, Copenhagen, Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Charlotte","family":"Wessel Skovlund","sequence":"additional","affiliation":[{"name":"Cancer Surveillance and Pharmacoepidemiology, The Danish Cancer Society Research Center, Copenhagen, Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lina Steinrud","family":"Morch","sequence":"additional","affiliation":[{"name":"Cancer Surveillance and Pharmacoepidemiology, The Danish Cancer Society Research Center, Copenhagen, Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Francesco","family":"Rossi","sequence":"additional","affiliation":[{"name":"Department of Experimental Medicine, Section of Pharmacology \u201cL. Donatelli,\u201d University of Campania \u2018L. Vanvitelli\u2019, Naples, Italy"},{"name":"Campania Regional Centre for Pharmacovigilance and Pharmacoepidemiology, Naples, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Annalisa","family":"Capuano","sequence":"additional","affiliation":[{"name":"Department of Experimental Medicine, Section of Pharmacology \u201cL. Donatelli,\u201d University of Campania \u2018L. 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