The review finds evidence for an increased incidence of breast cancer among women who work the night shift for several decades. There is no reason to conclude that the association is causal.
Evidence from:
Health Council of the Netherlands Report No. 2006/15E, June 29, 2006
“Night work and breast cancer: a causal relationship?”
In the Committee’s opinion, the research findings do not, at present, justify recommending special measures for women who perform night work for prolonged periods in addition to the current breast cancer screening programme. If new, scientifically sound research findings were to produce evidence of a causal relationship then one could consider what specific measures need to be taken.
Further detail: