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Table 3 Demographic profiles about the PD AAO GWAS dataset

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

Dataset

PD cases

Average age of onset of cases (range)

Sex ratio male/female of cases

Dutch GWAS [23]

764

54.94 (21–84)

1.74

Finnish GWAS

377

55.27 (30–66)

1.19

German GWAS [24]

663

55.84 (28–86)

1.55

Harvard Biomarker Study (HBS)

525

66.31 (35–89)

1.92

McGill Parkinson’s

580

65.56 (37–91)

1.89

IPDGC NeuroX [25]

5428

61.27 (20–89)

1.82

NIA PD GWAS [24]

845

58.25 (20–87)

1.46

OsloParkinson’s Disease Study

476

55.70 (24–83)

1.8

Parkinson’s Disease Biomarker’s Program (PDBP)

512

64.46 (34–87)

1.59

Parkinson’s Progression Markers Initiative (PPMI)

360

64.24 (36–87)

2.03

PROBAND

1815

66.25 (29–90)

1.85

PROPARK

235

55.69 (29–81)

2.09

Baylor College of Medicine/University of Maryland

764

64.83 (23–92)

1.95

Spanish GWAS [26]

1928

63.90 (20–95)

1.35

Tuebingen Parkinson’s Disease cohort

666

59.89 (23–87)

1.78

WTCCC PD GWAS [27]

1477

64.10 (23–96)

1.6

System Genomics of Parkinson’s disease (SGPD)

581

59.96 (24–84)

1.75

Total IPDGC

17,996

62.14 (20–96)

1.7

23 and Me

10,572

60.71 (40–97)

1.54

Total

28,568

61.71 (20–97)

1.64