Distribution of study sample according to 10 year onset age classes
| Early onset (years) | Late onset (years) | Total | |||||
|---|---|---|---|---|---|---|---|
| <30 | 30–39 | 40–49 | 50–59 | 60–69 | ⩾70 | ||
| All cases | 7 | 83 | 140 | 224 | 142 | 33 | 629 |
| G2019S heterozygous | – | 3 | 4 | 4 | – | 2 | 13 |
| Familial | 1 | 21 | 46 | 65 | 33 | 11 | 177 |
| G2019S heterozygous | – | 2 | 3 | 3 | – | 1 | 9 |
| Sporadic | 6 | 62 | 94 | 159 | 109 | 22 | 452 |
| G2019S heterozygous | – | 1 | 1 | 1 | – | 1 | 4 |