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Table 1 Distribution by sex and mean ages of onset or enrollment for the idiopathic Parkinson's disease (PD), familial PD, unaffected PD relative and controls samples

From: The Gly2019Ser mutation in LRRK2is not fully penetrant in familial Parkinson's disease: the GenePD study

  N Men (%) Women (%) Mean age at onset or *enrollment
Randomly ascertained PD 126 81 (64%) 45 (36%) 56.3
Familial PD 903 501 (55%) 402 (45%) 60.4
Unaffected relatives 59 26 (44%) 33 (56%) *58.7
Controls 197 95 (48%) 102 (52%) *65.9