Table 4. Effect in three groups of SNP4 genotype on verbal list learning (California Verbal Learning Test, 1–5 summary scores, CVLT 1–5 SS) and verbal fluency (for letters) scores.
| SNP4 | Verbal fluency | CVLT1-5SS | Number |
|---|---|---|---|
| Index A/A | 33.2 (11.8) | 28.8 (18.2) | 104 |
| Index A/G | 34.0 (12.0) | 30.4 (18.7) | 77 |
| Index G/G | 40.7 (14.0) | 43.1 (14.3) | 12 |
| sib A/A | 41.6 (11.3) | 51.6 (13.3) | 123 |
| sib A/G | 42.1 (10.9) | 49.2 (12.1) | 79 |
| sib G/G | 42.8 (11.8) | 49.8 (16.5) | 22 |
| Controls A/A | 43.5 (8.6) | 50.6 (11.4) | 73 |
| Controls A/G | 47.5 (10.2) | 50.5 (11.7) | 45 |
| Controls G/G | 48.5 (9.1) | 56.9 (9.5) | 13 |
| All groups | 39.9 (12.0) | 43.6 (17.8) | 548 |
SDs are given in parentheses. Genotype groups were well matched for age, gender, IQ, and education.