Effect of plasma vitamin C levels on Parkinson’s disease and age at onset: a Mendelian randomization study

Table 5 Pleiotropy analysis of 11 selected plasma vitamin C genetic variants

GWAS dataset	MR-Egger intercept			MR-PRESSO	Heterogeneity test
GWAS dataset	intercept	95% CI	P value	P value	I² (%)	95% CI	Q P value
PD	− 0.016	[− 0.043, 0.011]	0.243	0.08	42.4	[0.0%; 71.5%]	0.0669
PD AAO	0.127	[− 0.011, 0.266]	0.072	0.271	15.6	[0.0%; 56.1%]	0.2951

ISSN: 1479-5876