Symptoms of depression and insomnia in older age: A within-individual analysis over 20 years.
Annelies BrouwerPeter M van de VenAlmar KokFrank J SnoekAartjan T F BeekmanMarijke A BremmerPublished in: Journal of the American Geriatrics Society (2022)
In older individuals, depression and insomnia are associated and tend to increase concurrently over time, but constitute no additional risk for one another over repeated three-year intervals. These findings contradict previous research that suggests that depression and insomnia are risk factors for one another over time. The current study stands out due to the longitudinal within-individual statistical approach, but is limited by the three-year interval between measures.