Table 1 Baseline characteristics of the study population

Cohort at risk for any parkinsonism, n (%)Cohort at risk for Parkinson disease, n (%)
n6,8396,566
Women4,070 (59.5)3,876 (59.0)
Age at baseline
    55–65 y2,537 (37.1)2,530 (38.5)
    65–75 y2,456 (35.9)2,425 (36.9)
    75–85 y1,406 (20.6)1,294 (19.7)
    ≥85 y440 (6.4)317 (4.8)
    Mean (SD)69.4 (9.1)68.8 (8.7)
Living in nursing home518 (7.6)336 (5.1)
Dementia273 (4.0)
History of stroke194 (2.8)155 (2.4)