Marital status and risk of dementia: a nationwide population-based prospective study from Sweden.

Objectives: To examine the association between marital status and dementia in a cohort of young-old (50-64) and middle-old (65-74) adults, and also whether this may differ by gender.

Design: Prospective population-based study with follow-up time of up to 10 years.

Setting: Swedish national register-based study.