|  | Serum folate ≤25th percentile |  | Serum folate >25th percentile | P Interaction |
---|---|---|---|---|---|
μSAH (95 % CI)a |  | μSAH (95 % CI)a | |||
MTR | |||||
 AA | 95 | 26.7 (24.5–29.0) | 265 | 25.5 (24.0–27.0) | 0.72 |
 GA+GG | 45 | 27.3 (24.2, 30.3) | 160 | 25.2 (23.4, 27.1) |  |
MTHFR | |||||
 CC | 47 | 30.3 (27.3–33.4) | 185 | 25.6 (23.9–27.3) | 0.02 |
 CT | 67 | 26.1 (23.5–28.6) | 181 | 25.2 (23.4–26.9) |  |
 TT | 24 | 22.4 (18.2–26.6) | 57 | 26.0 (23.2–28.9) |  |