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We investigated the association between tea consumption and breast cancer risk using data from 45,744\u2009U.S. and Puerto Rican women participating in the Sister Study. Frequency and serving size of black and green tea consumption were measured at cohort enrollment. Breast cancer diagnoses were reported during follow\u2010up and confirmed by medical record review. Multivariable Cox proportional hazards regression was used to estimate hazard ratios (HR) and 95% confidence intervals (CI). We further investigated potential variation according to estrogen receptor (ER) status, menopausal status and body mass index (BMI). Overall, 81.6 and 56.0% of women drank black or green tea, respectively. A total of 2,809 breast cancer cases were identified in the cohort. The multivariable model suggested an inverse association between black (\u22655 <jats:italic>vs<\/jats:italic>. 0 cups\/week: HR = 0.88, 95% CI 0.78, 1.00, <jats:italic>p<\/jats:italic>\u2010trend = 0.08) and green tea (\u22655 <jats:italic>vs<\/jats:italic>. 0 cups\/week: HR = 0.82, 95% CI 0.70, 0.95, <jats:italic>p<\/jats:italic>\u2010trend\u2009&lt;\u20090.01) consumption and breast cancer risk. We did not observe differences by ER characteristics, menopausal status or BMI. In conclusion, our study suggests drinking at least five cups of green or black tea per week may be associated with decreased breast cancer risk.<\/jats:p>","DOI":"10.1002\/ijc.32824","type":"journal-article","created":{"date-parts":[[2019,12,14]],"date-time":"2019-12-14T02:39:16Z","timestamp":1576291156000},"page":"876-886","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":27,"title":["Tea consumption and breast cancer risk in a cohort of women with family history of breast cancer"],"prefix":"10.1002","volume":"147","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3545-1771","authenticated-orcid":false,"given":"Dongyu","family":"Zhang","sequence":"first","affiliation":[{"name":"Department of Oncology Georgetown University School of Medicine  Washington DC"},{"name":"Department of Epidemiology, Gillings School of Global Public Health University of North Carolina  Chapel Hill NC"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hazel B.","family":"Nichols","sequence":"additional","affiliation":[{"name":"Department of Epidemiology, Gillings School of Global Public Health University of North Carolina  Chapel Hill NC"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Melissa","family":"Troester","sequence":"additional","affiliation":[{"name":"Department of Epidemiology, Gillings School of Global Public Health University of North Carolina  Chapel Hill NC"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jianwen","family":"Cai","sequence":"additional","affiliation":[{"name":"Department of Biostatistics, Gillings School of Global Public Health University of North Carolina  Chapel Hill NC"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jeannette T.","family":"Bensen","sequence":"additional","affiliation":[{"name":"Department of Epidemiology, Gillings School of Global Public Health University of North Carolina  Chapel Hill NC"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Dale P.","family":"Sandler","sequence":"additional","affiliation":[{"name":"Epidemiology Branch National Institute of Environmental Health Sciences  Research Triangle Park NC"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2020,2,4]]},"reference":[{"key":"e_1_2_9_2_1","unstructured":"Cancer Facts & Figures 2019. 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