Changes in sleep duration and the risk of incident dementia in the elderly Japanese: the Ohsaki Cohort 2006 Study.

ABSTRACT:

Study objectives

To examine the association between changes in sleep duration and the risk of incident dementia in the elderly.

Methods

In 2006, we conducted a cohort study of 7422 disability-free Japanese individuals aged ≥65 years who lived in Ohsaki City, Japan. In both 1994 and 2006, the individual amount of sleep obtained was assessed using a self-reported questionnaire. Based on sleep duration at these two time points, participants were categorized into five groups according to the change in sleep duration. Data on incident dementia were retrieved from the public Long-term Care Insurance database, and the subjects were followed up for 5.7 years (between April 2007 and November 2012). The Cox proportional hazards model was used to estimate the multivariate-adjusted haza

SUBMITTER: Lu Y 

PROVIDER: S-EPMC6187102 | biostudies-literature | 2018 Oct

REPOSITORIES: biostudies-literature