Our results indicated that there was a significant difference between PD cases and controls when the X allele and 5/X+X/X genotype of the indel in exon 29 of the GIGYF2 gene was present compared with the 5 allele (OR = 1.378, 95% CI = 1.112–1.708, P = 0.003) and 5/5 genotype (OR = 1.681, 95% CI = 1.174–2.407, P = 0.004) (Table 4). This evidence concerns the gene GIGYF2 and Parkinson disease.