Table 2.

Allele Frequencies for the variants studied

Mutation/polymorphism	Allele frequencies in %
	Controls (n mutant/total n)a	Cases (n mutant/total n)a
QDPR c.68G > A	0.3 (2/612)	0.3 (1/300)
SPR c.596-2A > G	0.7 (4/594)	0.0 (0/296)
MTHFR c.677C > T	34.7 (216/622)	33.8 (102/302)
MTHFR c.1298A > C	35.9 (225/626)	37.7 (114/302)
Tested in cases only
LRRK2 c.6055G > A	-	1.4 (4/292)
LRRK2 c.4321C > G	-	0.0 (0/296)
SNCA c.209G > A	-	0.0 (0/292)

n = number of alleles

^aDNA of 79 controls and 27 cases had been used up and were therefore not available and a few samples did not yield PCR products