Sleep duration, melatonin and breast cancer among Chinese women in Singapore.

  title={Sleep duration, melatonin and breast cancer among Chinese women in Singapore.},
  author={Anna H Wu and Renwei Wang and W C A Koh and Frank Z. Stanczyk and H E Lee and Mimi C. Yu},
  volume={29 6},
BACKGROUND Sleep duration has been hypothesized to be inversely associated with breast cancer risk, possibly due to greater overall melatonin production in longer sleepers. However, data are inconclusive from the three studies conducted in Western populations on sleep duration and breast cancer risk. METHODS We investigated the relationship between self-reported usual sleep duration determined at baseline and subsequent risk of breast cancer in the prospective, population-based cohort of the… CONTINUE READING
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