Mortality related to actigraphic long and short sleep.

ABSTRACT:

Background

The folk belief that we should sleep 8 h seems to be incorrect. Numerous studies have shown that self-reported sleep longer than 7.5 h or shorter than 6.5 h predicts increased mortality risk. This study examined if prospectively-determined objective sleep duration, as estimated by wrist actigraphy, was associated with mortality risks.

Methods

From 1995-1999, women averaging 67.6 years of age provided one-week actigraphic recordings. Survival could be estimated from follow-up continuing until 2009 for 444 of the women, with an average of 10.5 years before censoring. Multivariate age-stratified Cox regression models were controlled for history of hypertension, diabetes, myocardial infarction, cancer, and major depression.

Results

Adjusted survival functions e

SUBMITTER: Kripke DF 

PROVIDER: S-EPMC3010336 | biostudies-literature | 2011 Jan

REPOSITORIES: biostudies-literature