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| Description | Number | Age | % Male | Age of onset |
| 23andMe controls | 29624 | 48.2 (16.0) | 58.5% | – |
| 23andMe cases | 3426 | 64.3 (10.6) | 60.3% | 57.4 (10.7) |
| IPDGC controls | 15470 | – | – | – |
| IPDGC cases | 6584 | – | – | – |
| NINDS controls | 799 | 58.6 (16.4) | 41.9% | – |
| NINDS cases | 932 | 66.2 (11.0) | 59.8% | 58.5 (13.1) |
Age is the average current age for the 23andMe cohort and the average age at collection for the NINDS cohort. Standard deviations are given in parentheses.
