Effects of between-person differences and within-person changes in symptoms of anxiety and depression on older age cognitive performance

Anxiety and depression are both important correlates of cognitive function. However, longitudinal studies investigating how they covary with cognition within the same individual are scarce. We aimed to simultaneously estimate associations of between-person differences and within-person variability in anxiety and depression with cognitive performance in a sample of non-demented older people.Participants in the Lothian Birth Cohort 1921 study, a...