Table 3. Comparison between genotype frequencies in the present and previous studies in initial series,10 Asian 11 and American 12 populations with familial essential tremor.
| Patients | Genotypes (%) | P-value (χ2) | ||
|---|---|---|---|---|
| AA | AG | GG | ||
| ET patients | ||||
| German/Danish/French sample | 131 (44) | 136 (45) | 32 (11) | χ2=9.342 d.f.: 8 P=0.314 |
| Asian sample11 | 72 (44) | 76 (47) | 15 (9) | |
| American sample12 | 92 (39) | 111 (47) | 34 (14) | |
| Initial French sample10 | 7 (23) | 18 (60) | 5 (17) | |
| Initial American sample10 | 124 (45) | 117 (42) | 35 (13) | |
| Controls | ||||
| German/Danish/French sample | 248 (47) | 226 (43) | 54 (10) | χ2=13.789 d.f.: 8 P=0.087 |
| Asian sample11 | 85 (44) | 87 (45) | 20 (11) | |
| American sample12 | 55 (45) | 47 (39) | 19 (16) | |
| Initial French sample10 | 30 (60) | 14 (28) | 6 (12) | |
| Initial American sample10 | 93 (51) | 81 (44) | 10 (5) | |