Table 1. Survey data of healthy KCR residents.
| Characteristic / Nationality | Karachays | Circassians | Abazins | Nogays |
|---|---|---|---|---|
| Number of examinees | 328 | 104 | 126 | 118 |
| Carriers identified | 31 | 2 | 3 | 2 |
| Carrier frequency a | 1:9 | 1:40 | 1:32 | 1:45 |
| PKU incidence b | 1:332 | 1:6380 | 1:4162 | 1:8213 |
| PKU incidence per 1000, ‰ | 3,01±0.10 | 0.16±0.04 | 0.24±0.04 | 0.12±0.03 |
a The proportion of PAH variant carriers identified in the studied groups of indigenous representatives of each ethnic group, taking into account the total allele frequency of variants studied.
b PKU incidence among newborns