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