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Range of total scores and disease duration
| Type of ataxia | Number of cases | Total scores (range) | Disease duration in years (mean±S.D.*) |
|---|---|---|---|
| Dominant ataxias | |||
| SCA-1 | 9 | 16–38 | 18±6 |
| SCA-2 | 6 | 22–39 | 23±8 |
| SCA-3 | 4 | 9–15 | 14±4 |
| SCA-6 | 2 | 13, 25 | 40, 54 |
| SCA-7 | 1 | 16 | 11 |
| SCA-17 | 1 | 31 | 12 |
| SCA, unknown mutation | 2 | 36, 37 | 29, 39 |
| FRDA* | |||
| FRDA | 9 | 11–19 | 27±14 |
Abbreviations: FRDA, Friedreich’s ataxia; SCA, spinocerebellar ataxia; S.D., standard deviation (for means of 3 or more subjects)
