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German Interdisciplinary Longitudinal Study on Adult Development and Aging
Average Follow-up Time Detail
"Subjects have been followed up since 1993/94 for an average time of 12 years within three examination waves (t1: 1993/94; t2: 1997/98; t3: 2005/07)."
"Physical activity was assessed with a questionnaire at baseline. Participants were asked about their current and past sport activities using open-ended questions. Additionally, they were asked if they performed the respective activities on a regular basis and how many hours they spent on them per week. According to current WHO recommendations  subjects were classified as physically active if they reported at least one sport
activity, for at least once a week for two hours over any year-long interval. Subjects were classified as physically active throughout their whole lifetime if they fulfilled the above criteria during childhood (6–14 years), youth (14–20 years), young adulthood (20–40 years), mid-adulthood (40–60 years), and at t1. The remaining subjects were classified as 'never' or 'not continually physically active' according to their statements."
No data on ethnicity was reported, however all participants reside in Germany.
The 381 initially healthy participants from the 1930–32 birth cohort who completed the 3rd examination wave had an average age of 74 years.
Screening and Diagnosis Detail
Mini-Mental State Examination (Folstein 1975)
Trail Making Test (Reitan 1958)
National Institute of Neurological and Communicative Diseases and Stroke/Alzheimer's Disease and Related Disorders Association Criteria (McKhann 1984)
Vascular dementia diagnosis:
Covariates & Analysis Detail
Only participants with complete data on all variables were used.
body mass index
Age was adjusted for through restriction, as participants comprised a birth cohort, born from 1930 through 1932, and were initially assessed from 1993 through 1994.