{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,25]],"date-time":"2026-01-25T23:58:30Z","timestamp":1769385510095,"version":"3.49.0"},"reference-count":32,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2019,1,8]],"date-time":"2019-01-08T00:00:00Z","timestamp":1546905600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"name":"BreastScreen Victoria"},{"name":"Volpara Health Technologies Limited, Wellington, New Zealand"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["J Med Imag Rad Onc"],"published-print":{"date-parts":[[2019,4]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Introduction<\/jats:title><jats:p>The aim of this study was to investigate mammographic density in a sample of Victorian women and explore a possible association between mammographic density and ethnicity.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Categories of mammographic density, using Volpara Density Grade, were reported using two editions of Volpara automated software in a data set of women attending two Victorian sites for mammographic screening. The variables available for analysis were age, self\u2010reported exposure to menopausal hormone therapy (<jats:styled-content style=\"fixed-case\">MHT<\/jats:styled-content>) and ethnicity based on country of birth.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Data from 16,943 women were available for analysis. Using the <jats:styled-content style=\"fixed-case\">VDG<\/jats:styled-content> 4th edition, 40% of women were classified in the higher two categories (42% for the 5th edition) and 76.9% of women were in the same <jats:styled-content style=\"fixed-case\">VDG<\/jats:styled-content> category using both systems. In the sample, 87.7% of women were in the age range currently invited for screening in Victoria (50\u201374\u00a0years). Of the total group, 82.5% could be classified on the basis of country of birth. In multivariable logistic regression analyses examining factors associated with higher <jats:styled-content style=\"fixed-case\">VDG<\/jats:styled-content>, age (protective), use of <jats:styled-content style=\"fixed-case\">MHT<\/jats:styled-content> (risk factor) and being born in a country with predominantly Asian ancestry (risk factor) were all statistically significant at <jats:italic>P\u00a0<\/jats:italic>&lt;<jats:italic>\u00a0<\/jats:italic>0.001 for both editions irrespective of whether the reference category was the lowest two or three <jats:styled-content style=\"fixed-case\">VDG<\/jats:styled-content> categories.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Mammographic density as assessed by <jats:styled-content style=\"fixed-case\">VDG<\/jats:styled-content> was positively associated with ever exposure to <jats:styled-content style=\"fixed-case\">MHT<\/jats:styled-content> and inversely associated with age. Being born in a country with predominantly Asian ancestry was associated with higher <jats:styled-content style=\"fixed-case\">VDG<\/jats:styled-content> when controlled for age and <jats:styled-content style=\"fixed-case\">MHT<\/jats:styled-content> exposure.<\/jats:p><\/jats:sec>","DOI":"10.1111\/1754-9485.12849","type":"journal-article","created":{"date-parts":[[2019,1,9]],"date-time":"2019-01-09T07:58:42Z","timestamp":1547020722000},"page":"183-189","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Using an automated measure of breast density to explore the association between ethnicity and mammographic density in Australian women"],"prefix":"10.1111","volume":"63","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1935-7627","authenticated-orcid":false,"given":"Robin J","family":"Bell","sequence":"first","affiliation":[{"name":"School of Public Health and Preventive Medicine Monash University Melbourne Victoria 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