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Table 1 Demographic data describing the study populations

From: S100B polymorphisms are associated with age of onset of Parkinson’s disease

  Discovery cohort Validation cohort All
N 896 573 1469
Controls 465 378 843
 Mean age 74.1 67.5 70.8
 Males (%) 134 (28.8) 187 (49.5) 321 (38.1)
PD Patients 431 195 626
 Mean age 67.6 71.4 69.5
 Males (%) 258 (59.9) 121 (62.1) 379 (60.5)
Mean age of onset 59.3 63.6 61.5
Onset ≤50 y. of age (%) 87 (20.2) 25 (12.8) 112 (17.9)