A new study of women in Denmark suggests that decades of medical advice may have been off the mark. The study, reported in the Annals of Neurology, found that high levels of cholesterol do not predict the risk of stroke in women, and that even with men, association with stroke was found only with very high cholesterol levels (higher than 9mmol/litre.) The BBC reports that the 33-year study followed 13,951 men and women.The researchers did find a link, in both men and women, between the risk of stroke and nonfasting triglycerides.