Frequencies of haplogroups H, J, K, T, and U in patients with Friedreich’s ataxia, classified according the presence or absence of hypertrophic cardiomyopathy (HCM) and the repeat length
| Group A | Group B | |||
|---|---|---|---|---|
| Haplogroups | HCM+ | HCM− | HCM+ | HCM− |
| Group A includes patients carrying a GAA expansion <654 triplets. | ||||
| Group B includes patients carrying a GAA expansion ⩾ 654 triplets. | ||||
| HCM+/− means the presence or absence of hypertrophic cardiomyopathy. | ||||
| H | 16 | 4 | 2 | 12 |
| J | 5 | 1 | 0 | 3 |
| K | 2 | 2 | 3 | 0 |
| T | 2 | 4 | 0 | 2 |
| U | 2 | 5 | 1 | 4 |