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Author |
Fritschi, L.; Erren, T.C.; Glass, D.C.; Girschik, J.; Thomson, A.K.; Saunders, C.; Boyle, T.; El-Zaemey, S.; Rogers, P.; Peters, S.; Slevin, T.; D'Orsogna, A.; de Vocht, F.; Vermeulen, R.; Heyworth, J.S. |
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Title |
The association between different night shiftwork factors and breast cancer: a case-control study |
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Journal Article |
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Year |
2013 |
Publication |
British Journal of Cancer |
Abbreviated Journal |
Br J Cancer |
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Volume |
109 |
Issue |
9 |
Pages |
2472-2480 |
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Keywords |
Adult; Aged; Aged, 80 and over; Breast Neoplasms/*epidemiology/etiology; Case-Control Studies; Female; Humans; Life Style; Middle Aged; Questionnaires; Risk; Risk Factors; Western Australia/epidemiology; *Work Schedule Tolerance; Young Adult; oncogenesis |
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Abstract |
BACKGROUND: Research on the possible association between shiftwork and breast cancer is complicated because there are many different shiftwork factors, which might be involved including: light at night, phase shift, sleep disruption and changes in lifestyle factors while on shiftwork (diet, physical activity, alcohol intake and low sun exposure). METHODS: We conducted a population-based case-control study in Western Australia from 2009 to 2011 with 1205 incident breast cancer cases and 1789 frequency age-matched controls. A self-administered questionnaire was used to collect demographic, reproductive, and lifestyle factors and lifetime occupational history and a telephone interview was used to obtain further details about the shiftwork factors listed above. RESULTS: A small increase in risk was suggested for those ever doing the graveyard shift (work between midnight and 0500 hours) and breast cancer (odds ratio (OR)=1.16, 95% confidence interval (CI)=0.97-1.39). For phase shift, we found a 22% increase in breast cancer risk (OR=1.22, 95% CI=1.01-1.47) with a statistically significant dose-response relationship (P=0.04). For the other shiftwork factors, risks were marginally elevated and not statistically significant. CONCLUSION: We found some evidence that some of the factors involved in shiftwork may be associated with breast cancer but the ORs were low and there were inconsistencies in duration and dose-response relationships. |
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Western Australian Institute for Medical Research, The University of Western Australia, Nedlands, Western Australia, Australia |
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Language |
English |
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ISSN |
0007-0920 |
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Notes |
PMID:24022188; PMCID:PMC3817316 |
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no |
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Call Number |
IDA @ john @ |
Serial |
153 |
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