{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,8]],"date-time":"2026-04-08T16:39:01Z","timestamp":1775666341593,"version":"3.50.1"},"reference-count":53,"publisher":"American Medical Association (AMA)","issue":"10","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JAMA Netw Open"],"abstract":"<jats:sec id=\"ab-zoi241101-4\"><jats:title>Importance<\/jats:title><jats:p>Breast cancer (BC) is commonly diagnosed among Caribbean women. Shifts in reproductive patterns modify the incidence of BC diagnosis and age at BC diagnosis in population-based studies; however, reproductive patterns in Caribbean women remain understudied.<\/jats:p><\/jats:sec><jats:sec id=\"ab-zoi241101-5\"><jats:title>Objective<\/jats:title><jats:p>To describe the temporal trends in reproductive patterns and age at BC diagnosis in Caribbean-born women.<\/jats:p><\/jats:sec><jats:sec id=\"ab-zoi241101-6\"><jats:title>Design, Setting, and Participants<\/jats:title><jats:p>A cross-sectional observational study\u2014the Caribbean Women\u2019s Cancer Study\u2014was conducted, with data on reproductive patterns known to affect BC risk collected in The Bahamas, Barbados, Cayman Islands, Dominica, Haiti, Jamaica, and Trinidad and Tobago. Participants were recruited prospectively. The sample included women born in Caribbean countries and diagnosed with invasive BC and\/or ovarian cancer from June 1, 2010, to June 30, 2018, and was divided into 4 birth cohorts (born before 1950, 1950-1959, 1960-1969, and in or after 1970). Data were analyzed between August 1, 2023, and July 31, 2024.<\/jats:p><\/jats:sec><jats:sec id=\"ab-zoi241101-7\"><jats:title>Exposures<\/jats:title><jats:p>Receipt of a BC diagnosis and birth in a Caribbean country.<\/jats:p><\/jats:sec><jats:sec id=\"ab-zoi241101-8\"><jats:title>Main Outcomes and Measures<\/jats:title><jats:p>Change in reproductive patterns between birth cohorts, including age at BC diagnosis, family history of cancer, age at first pregnancy, number of pregnancies, number of full-term pregnancies, number of siblings, age at menarche and menopause, estrogen receptor status, and germline pathogenic\/likely pathogenic variants.<\/jats:p><\/jats:sec><jats:sec id=\"ab-zoi241101-9\"><jats:title>Results<\/jats:title><jats:p>Of 1015 participants diagnosed with BC and ovarian cancer, 995 women (mean [SD] age, 46.6 [10.8] years; 605 [81.8%] Afro-Caribbean, 98 [13.2%] East Indian, 22 [3.0%] White, and 12 [1.6%] &amp;amp;gt;1 race) received a diagnosis of invasive BC. Comparison from older to younger birth cohorts (presented in the order of born before 1950, 1950-1959, 1960-1969 and in or after 1970) showed an increased proportion of women experiencing menarche at age 12 years or younger (33.0% vs 47.3% vs 45.5% vs 57.9%; <jats:italic>P<\/jats:italic>\u2009&amp;amp;lt;\u2009.001), women with no pregnancies (6.8% vs 6.8% vs 10.5% vs 22.8%; <jats:italic>P<\/jats:italic>\u2009&amp;amp;lt;\u2009.001), and nulliparous women (8.6% vs 9.2% vs 13.9% vs 27.6%; <jats:italic>P<\/jats:italic>\u2009&amp;amp;lt;\u2009.001). Younger age at BC diagnosis was observed in women experiencing menarche at age 12 years or younger (mean [SD], 45.0 [10.5] years) vs 15 years or older (mean [SD], 49.1 [11.2] years) and in nulliparous women (mean [SD], 42.1 [11.2] years) vs 3 or more full-term pregnancies (mean [SD], 49.9 [10.6] years; <jats:italic>P<\/jats:italic>\u2009&amp;amp;lt;\u2009.001). For every year of first pregnancy delay, women had a 4% increased chance of being diagnosed with estrogen receptor\u2013positive tumors (odds ratio, 1.04; 95% CI, 1.01-1.08; <jats:italic>P<\/jats:italic>\u2009=\u2009.02).<\/jats:p><\/jats:sec><jats:sec id=\"ab-zoi241101-10\"><jats:title>Conclusions and Relevance<\/jats:title><jats:p>In this cross-sectional study, between each 10-year birth cohort, women diagnosed with BC had a lower age at menarche, number of pregnancies, and number of full-term pregnancies. These findings suggest that interventions targeting other BC risk factors need to be implemented.<\/jats:p><\/jats:sec>","DOI":"10.1001\/jamanetworkopen.2024.38091","type":"journal-article","created":{"date-parts":[[2024,10,8]],"date-time":"2024-10-08T16:24:39Z","timestamp":1728404679000},"page":"e2438091","source":"Crossref","is-referenced-by-count":6,"title":["Reproductive Risk Factor Patterns in Caribbean Women With Breast Cancer Across 4 Generations"],"prefix":"10.1001","volume":"7","author":[{"given":"Alex P.","family":"Sanchez-Covarrubias","sequence":"first","affiliation":[{"name":"Cancer Biology Graduate Program, Miller School of Medicine, University of Miami, Miami, Florida"},{"name":"Division of Gynecologic Oncology, Department of Obstetrics, Gynecology, and Reproductive Sciences, Miller School of Medicine, University of Miami, Miami, Florida"},{"name":"Sylvester Comprehensive Cancer Center, Miami, 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Haiti"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Leah V.","family":"Dodds","sequence":"additional","affiliation":[{"name":"Division of Gynecologic Oncology, Department of Obstetrics, Gynecology, and Reproductive Sciences, Miller School of Medicine, University of Miami, Miami, Florida"},{"name":"Sylvester Comprehensive Cancer Center, Miami, Florida"},{"name":"Division of Prevention Science, Department of Public Health Sciences, Miller School of Medicine, University of Miami, Miami, Florida"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hedda","family":"Dyer","sequence":"additional","affiliation":[{"name":"Ross University School of Medicine, St Michael, Barbados"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Darron","family":"Halliday","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology, School of Clinical Medicine and Research, Princess Margaret Hospital, University of the West Indies, Nassau, The Bahamas"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Patricia","family":"Jeudin","sequence":"additional","affiliation":[{"name":"Division of Gynecologic Oncology, Department of Obstetrics, Gynecology, and Reproductive Sciences, Miller School of Medicine, University of Miami, Miami, Florida"},{"name":"Sylvester Comprehensive Cancer Center, Miami, Florida"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Dwight","family":"Lowe","sequence":"additional","affiliation":[{"name":"University of the West Indies\u2013Mona, Kingston, Jamaica"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kristy","family":"Samaroo","sequence":"additional","affiliation":[{"name":"St James Medical Complex, North Northwest Regional Health Authority, Port-of-Spain, Trinidad and Tobago"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Gillian","family":"Wharfe","sequence":"additional","affiliation":[{"name":"University of the West Indies\u2013Mona, Kingston, Jamaica"},{"name":"Cayman Islands Cancer Society, Grand Cayman, Cayman Islands"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Matthew","family":"Schlumbrecht","sequence":"additional","affiliation":[{"name":"Division of Gynecologic Oncology, Department of Obstetrics, Gynecology, and Reproductive Sciences, Miller School of Medicine, University of Miami, Miami, Florida"},{"name":"Sylvester Comprehensive Cancer Center, Miami, Florida"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Isildinha M.","family":"Reis","sequence":"additional","affiliation":[{"name":"Sylvester Comprehensive Cancer Center, Miami, Florida"},{"name":"Division of Statistics, Department of Public Health Sciences, Miller School of Medicine, University of Miami, Miami, Florida"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Judith","family":"Hurley","sequence":"additional","affiliation":[{"name":"Sylvester Comprehensive Cancer Center, Miami, 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