More than 52,610 men and women filled questionnaires about the frequency of having difficulty falling asleep , their sleep behavior and the way they felt. This study was conducted for over a period of 11 years.
The researchers did not control for sleep apnea, known to be associated with cardiovascular illness, but they did control for body mass index and blood pressure, two factors highly correlated with that disorder. “This is just one study,” said the …
Dr Lars E laugsand of the Norwegian University of Science and Technology and the lead author of the report wants to lead more
studies in order to be able to explain the mechanism behind these associations.