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Longitudinal repeated measures of weight and height were collected, along with a questionnaire survey including questions on body size. Multilevel mixed-effects models were used to examine changes in body mass index (BMI). Delayed entry Cox proportional hazards models were used to investigate the impacts of changing slope of BMI on survival outcomes.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      At diagnosis, most patients were overweight or obese with a mean BMI of 27.5\u2009kg\/m\n                      <jats:sup>2<\/jats:sup>\n                      and 31.5\u2009kg\/m\n                      <jats:sup>2<\/jats:sup>\n                      for Blacks and Whites, respectively. Notably, about 45% of the patients had cachexia before death and substantial weight loss started about 30\u2009months before death. In multivariable-adjusted analyses, compared to stable weight, BMI loss (&gt;\u20090.5\u2009kg\/m\n                      <jats:sup>2<\/jats:sup>\n                      \/year) showed greater than 2-fold increased risk in overall survival (hazard ratio [HR]\u2009=\u20092.60, 95% CI 1.88\u20133.59), breast cancer-specific survival (HR\u2009=\u20093.05, 95% CI 1.91\u20134.86), and disease-free survival (HR\u2009=\u20092.12, 95% CI 1.52\u20132.96). The associations were not modified by race, age at diagnosis, and pre-diagnostic weight. BMI gain (&gt;\u20090.5\u2009kg\/m\n                      <jats:sup>2<\/jats:sup>\n                      \/year) was also related to worse survival, but the effect was weak (HR\u2009=\u20091.60, 95% CI 1.10\u20132.33 for overall survival).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>BMI loss is a strong predictor of worse breast cancer outcomes. Growing prevalence of obesity may hide diagnosis of cancer cachexia, which can occur in a large proportion of breast cancer patients long before death.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1186\/s13058-021-01397-9","type":"journal-article","created":{"date-parts":[[2021,2,4]],"date-time":"2021-02-04T08:22:27Z","timestamp":1612426947000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":39,"title":["Impact of post-diagnosis weight change on survival outcomes in Black and White breast cancer patients"],"prefix":"10.1186","volume":"23","author":[{"given":"Lihua","family":"Shang","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Masaya","family":"Hattori","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gini","family":"Fleming","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nora","family":"Jaskowiak","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Donald","family":"Hedeker","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Olufunmilayo I.","family":"Olopade","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4041-1678","authenticated-orcid":false,"given":"Dezheng","family":"Huo","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2021,2,4]]},"reference":[{"key":"1397_CR1","unstructured":"Fryar CD, Kruszon-Moran D, Gu Q, Ogden CL. 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