The links between sleep and cancer are now so many, you could build a chain. A new study has found that for men who suffer
That research expands on a growing body of evidence that men and women whose sleep is short, broken or of poor quality are at higher risk of developing a wide range of cancers.
Research has long linked overnight shift work -- and the circadian rhythm disruptions that are common with it -- as a risk factor for
In the latest study, published Tuesday in the journal Cancer Epidemiology, Biomarkers & Prevention, researchers asked 2,425 Icelandic men between the ages of 67 and 96 about their sleep patterns, and how often they experienced difficulty getting or staying asleep. Using a national registry, they tracked the men's medical history for between three and seven years, looking for evidence of a prostate cancer diagnosis or death of any cause.
Compared with men who reported no sleep problems, those who reported having trouble falling asleep were roughly 60% more likely to develop prostate cancer during the study period, the researchers found. And those who reported having trouble staying asleep were more than twice as likely as those with no sleep problems to be diagnosed with prostate cancer. The study's authors found some evidence that those with sleep difficulties were more likely to have advanced prostate disease than those who slept well.