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Title: Brassiere wearing and breast cancer risk : a systematic review and meta-analysis
Authors: So, WKW
Chan, DNS
Lou, Y
Choi, KC
Chan, CWH
Shin, K 
Kwong, A
Lee, DTF
Issue Date: 2015
Source: World journal of meta-analysis, 2015, v. 3, no. 4, p. 193-205
Abstract: AIM: To evaluate existing evidence for the association between different type of brassiere exposures and the risk of breast cancer.
METHODS: Ovid Medline, CINAHL, Cochrane Data Base of Systematic Reviews, Pubmed, Scopus, Proquest, Sciencedirect, Wiley Online Library, WanF ang Data, Hong Kong Index to Chinese Periodicals,China Journal Net,Chinese Medical Current Contents, Chinese Biomedical Literature Database, China Academic Journals FullText database, Taiwan Electronic Periodical Services and HyR ead; reference lists of published studies; original research studies published in English or Chinese examining the association between type and duration of brassiere-wearing and breast cancer risk. Data were abstracted by a first reviewer and verified by a second. Study quality was rated according to predefined criteria."Fair" or "good" quality studies were included. Results were summarised by meta-analysis whenever adequate material was available.
RESULTS:Twelve case-control studies were included in the review.Meta-analysis showed brassiere wearing during sleep was associated with a 1.3 times of increased risk. The odd ratio for more than 12 h of daily brassiere use in relation to breast cancer risk was 1.08(95%CI:1.01-1.14).
CONCLUSION:The present review demonstrates insufficient evidence to establish a positive association between the duration and type of brassiere wearing and breast cancer.Further research is essential; specifically,a large-scale epidemiological study of a better design is needed to examine the association between various forms of brassiere exposure in detail and breast cancer risk,with adequate control of confounding variables.
Keywords: Breast cancer
Risk factors
Systematic review
Publisher: Baishideng Publishing Group
Journal: World journal of meta-analysis 
ISSN: 2308-3840
Rights: © 2015 Baishideng Publishing Group Inc. All rights reserved.
This article is an open-access article which was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See:
The following publication So, W. K. W., Chan, D. N. S., Lou, Y., Choi, K. C., Chan, C. W. H., Shin, K., ... & Lee, D. T. F. (2015). Brassiere wearing and breast cancer risk: A systematic review and meta-analysis. World Journal of Meta-Analysis, 3(4), 193-205 is available at
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