Abstract:
PURPOSE:Evidence suggests that premenopausal obesity decreases and postmenopausal obesity increases breast cancer risk. Because it is not well known whether this is subtype dependent, we studied the association between body mass index (BMI) and age at breast cancer diagnosis, or the probability of being diagnosed with a specific breast cancer phenotype, by menopausal status. METHODS:All patients with non-metastatic operable breast cancer from the University Hospital Leuven diagnosed between January 1, 2000 and December 31, 2013 were included (n = 7020) in this cross-sectional study. Linear models and logistic regression were used for statistical analysis. Allowing correction for age-related BMI-increase, we used the age-adjusted BMI score which equals the difference between a patient's BMI score and the population-average BMI score corresponding to the patient's age category. RESULTS:The quadratic relationship between the age-adjusted BMI and age at breast cancer diagnosis (p = 0.0207) interacted with menopausal status (p < 0.0001); increased age at breast cancer diagnosis was observed with above-average BMI scores in postmenopausal women, and with below-average BMI scores in premenopausal women. BMI was linearly related to the probabilities of Luminal B and HER2-like breast cancer phenotypes, but only in postmenopausal women. The relative changes in probabilities between both these subtypes mirrored each other. CONCLUSION:BMI associates differently before and after menopause with age at breast cancer diagnosis and with the probability that breast cancer belongs to a certain phenotype. The opposite effect of increasing BMI on relative frequencies of Luminal B and HER2-like breast cancers suggests a common origin.
journal_name
Breast Cancer Res Treatjournal_title
Breast cancer research and treatmentauthors
Brouckaert O,Van Asten K,Laenen A,Soubry A,Smeets A,Nevelstreen I,Vergote I,Wildiers H,Paridaens R,Van Limbergen E,Weltens C,Moerman P,Floris G,Neven P,Multidisciplinary breast centre Leuven.doi
10.1007/s10549-017-4579-8subject
Has Abstractpub_date
2018-02-01 00:00:00pages
189-196issue
1eissn
0167-6806issn
1573-7217pii
10.1007/s10549-017-4579-8journal_volume
168pub_type
杂志文章abstract::The high potency and selectivity of new aromatase inhibitors has translated to greater efficacy and improved tolerability in comparison with established second-line hormonal agents for advanced breast cancer in phase III clinical trials. Two pharmacological studies are reported which assess the use of one of these inh...
journal_title:Breast cancer research and treatment
pub_type: 临床试验,杂志文章
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