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Population-Specific Breakdown of Families and Individuals
| Population | No. ofFamilies | No. ofIndividualsa | AffectedIndividuals(M:F) | UnaffectedFounders(M:F) | UnaffectedNonfounders(M:F) |
| Australian | 97 | 330 | 59:142 | 33:37 | 26:33 |
| Scandinavian | 165 | 475 | 140:215 | 26:54 | 18:22 |
| British | 298 | 1,023 | 186:428 | 107:159 | 65:78 |
| American | 170 | 864 | 128:297 | 92:110 | 121:116 |
Numbers of individuals for whom DNA was available and typed
