Table 2.
Fragile X female premutation allele carrier frequency by ethnic group
| Ethnicitya | Premutation allele carrier frequencyb (95% confidence interval) |
|---|---|
| African American/Black | 1 in 267 (1 in 269 to 1 in 263) |
| Ashkenazi Jewish | 1 in 102 (1 in 105 to 1 in 95) |
| Asian | 1 in 419 (1 in 428 to 1 in 404) |
| Caucasian/White | 1 in 170 (1 in 170 to 1 in 170) |
| Hispanic | 1 in 253 (1 in 254 to 1 in 251) |
| Other/Mixed/Unknown | 1 in 203 (1 in 203 to 1 in 201) |
| Sephardic Jewish | 1 in 96 (1 in 140 to 1 in 57) |
a
Native Americans are not included since none were found to be premutation carriers.
b
Overall female premutation allele carrier frequency was found to be 1 in 201 (1 in 202 to 1 in 201).