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Author (up) Li, Q.; Zheng, T.; Holford, T.R.; Boyle, P.; Zhang, Y.; Dai, M. url  doi
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  Title Light at night and breast cancer risk: results from a population-based case-control study in Connecticut, USA Type Journal Article
  Year 2010 Publication Cancer Causes & Control : CCC Abbreviated Journal Cancer Causes Control  
  Volume 21 Issue 12 Pages 2281-2285  
  Keywords Adult; Aged; Aged, 80 and over; Breast Neoplasms/epidemiology/*etiology; Carcinoma/epidemiology/*etiology; Case-Control Studies; Circadian Rhythm/physiology; Connecticut/epidemiology; Female; Humans; *Light/adverse effects; Middle Aged; Population; Questionnaires; Risk Factors; United States/epidemiology; Work Schedule Tolerance/physiology; Oncogenesis  
  Abstract OBJECTIVE: To investigate the potential association between domestic exposure to light at night (LAN) and the risk of human breast cancer. METHODS: A case-control study of female breast cancer was conducted in Connecticut. A total of 363 incident breast cancer cases and 356 age frequency-matched controls were interviewed using a standardized, structured questionnaire to obtain information on sleeping patterns and bedroom light environment. Odds ratios (ORs) and 95% confidence intervals (CIs) were estimated by unconditional multivariate logistic regression. RESULTS: A non-significantly increased risk of breast cancer was observed among postmenopausal women for those keeping lights on while sleeping (OR = 1.4, 95% CI 0.7, 2.7), those who reported mainly sleeping in the daytime (OR = 1.4, 95% CI 0.5, 4.3), and those not drawing the curtains/window shades while sleeping at night (OR = 1.2, 95% CI 0.8, 1.9). CONCLUSION: The results from this study suggest a potential increased risk of breast cancer associated with domestic exposure to LAN. Further studies with larger sample size are needed to confirm the results.  
  Address Department of Social Medicine, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0957-5243 ISBN Medium  
  Area Expedition Conference  
  Notes PMID:20927578; PMCID:PMC3154700 Approved no  
  Call Number IDA @ john @ Serial 161  
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