title: Risk of dementia in older adults with low versus high occupation-based motivational processes: differential impact of frequency and proximity of social network.
abstract: OBJECTIVE
  This study investigates the impact of occupation-based motivational processes and social network variables on the incidence of dementia over 8 years.
  
  
  METHODS
  Data were derived from the Leipzig Longitudinal Study of the Aged (LEILA75+), a population-based longitudinal study of individuals aged 75 years and older (n=1692 at baseline). Motivational processes were estimated based on the main occupation using the Occupational Information Network database.
  
  
  RESULTS
  In a Cox proportional hazard model, motivational processes were not associated with the risk of dementia (hazard ratio [HR]: 0.93, 95% confidence interval [CI]: 0.74-1.16). Individuals with a higher frequency of social contact at baseline had a significantly lower risk of dementia (HR: 0.96, 95% CI: 0.91-0.99), while proximity of social contacts was not linked to the risk of dementia (HR: 1.03, 95% CI: 0.98-1.08). In individuals with low indices of motivational processes, the frequency of social contacts was associated with a lower risk of dementia (HR: 0.94, 95% CI: 0.88-1.00). On the other hand, proximity of social contacts was linked to a higher risk of dementia in individuals with high indices of motivational processes (HR: 1.09, 95% CI: 1.01-1.19).
  
  
  CONCLUSIONS
  Results indicate that the frequency and proximity of social contacts have a differential impact on the risk of dementia according to lower or higher indices of motivational processes, while the impact of motivational processes on risk of dementia could not be confirmed. Future studies should carefully disentangle different aspects of social interactions and their association with motivational processes.
authors.affiliation: Department of Psychology, Psychopathology and Clinical Intervention, University of Zurich Private Clinic Meiringen, Center for Psychiatry and Psychotherapy sonja.fankhauser@privatklinik-meiringen.ch.
authors.forename: Sonja
authors.initials: S
authors.lastname: Fankhauser
authors.affiliation: Department of Psychology, Psychopathology and Clinical Intervention, University of Zurich Dept. of Education & Psychology, Developmental Psychology, University of Siegen.
authors.forename: Simon
authors.initials: S
authors.lastname: Forstmeier
authors.affiliation: Department of Psychology, Psychopathology and Clinical Intervention, University of Zurich.
authors.forename: Andreas
authors.initials: A
authors.lastname: Maercker
authors.affiliation: Institute of Social Medicine, Occupational Health and Public Health (ISAP), University of Leipzig.
authors.forename: Melanie
authors.initials: M
authors.lastname: Luppa
authors.affiliation: Private Clinic Meiringen, Center for Psychiatry and Psychotherapy LIFE - Leipzig Research Center for Civilization Diseases, University of Leipzig.
authors.forename: Tobias
authors.initials: T
authors.lastname: Luck
authors.affiliation: Institute of Social Medicine, Occupational Health and Public Health (ISAP), University of Leipzig.
authors.forename: Steffi G
authors.initials: SG
authors.lastname: Riedel-Heller
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000544:Alzheimer Disease / Q000150:complications; D003704:Dementia / Q000453:epidemiology* / Q000523:psychology*; D004198:Disease Susceptibility; D005260:Female; D006801:Humans; D015994:Incidence; D007398:Interpersonal Relations; D008137:Longitudinal Studies; D008297:Male; D009042:Motivation; D009790:Occupations / Q000706:statistics & numerical data*; D016016:Proportional Hazards Models; D012306:Risk; D060756:Social Networking
keywords: dementia; motivation; self-regulation; social network