Nagel G, Peter RS, Klotz E, Brozek W, Concin H. Bone mineral density and breast cancer risk: Results from the Vorarlberg Health Monitoring & Prevention Program and meta-analysis.
Bone Rep 2017;
7:83-89. [PMID:
29018837 PMCID:
PMC5626919 DOI:
10.1016/j.bonr.2017.09.004]
[Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Revised: 09/13/2017] [Accepted: 09/20/2017] [Indexed: 01/25/2023] Open
Abstract
We investigated the association between bone mineral density (BMD) and breast cancer risk in a large prospective cohort and quantified the evidence in a meta-analysis of prospective studies.
Baseline BMD has been measured by dual energy X-ray absorptiometry (DXA, N = 1418). Data on medication and lifestyle has been collected by questionnaire. Cox proportional Hazards models were applied to calculate Hazard Ratios for breast cancer. In addition, a meta-analysis on categorical and dose-response values including the current results has been performed applying random-effects models.
During mean follow-up of 16.3 (SD 3.3) years of 1380 women (mean age 55.5 ± 6.3 years), 52 cases of invasive breast cancer were identified. We found no statistically significant association of BMD with breast cancer risk (per one z-score increase, HR 0.91, 95% CI 0.67–1.23).
In the meta-analysis, however, breast cancer risk increased by 15% and 16% per 0.1 g/m2 increase in BMD at the lumbar spine (95% CI 0.99–1.33) and at the femoral neck (95% CI 1.02–1.32), respectively. Compared to the lowest, the HRs for breast cancer were statistically significant for the highest BMD category, i.e. 1.49 (95% CI 1.04–2.13) at the lumbar spine and 1.66 (95% CI 1.26–2.18) at the femur.
We found no association between BMD (DXA) and breast cancer risk in our cohort. However, overall the present meta-analysis extends and confirms the statistically significant association between increasing BMD and increased breast cancer risk.
In the VHM&PP BMD (DXA) was not associated with breast cancer risk.
A meta-analysis showed a positive association between BMD and breast cancer risk in postmenopausal women.
Per 0.1 g/m2 increase in BMD breast cancer risk increased by 15% at the lumbar spine and 16% at the femoral neck.
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