|  |  | 95% confidence interval | P value for trend* | P for interaction* | |
---|---|---|---|---|---|---|
 | N | β*c | Lower | Upper | ||
MTHFR (rs1801133) | Â | Â | Â | Â | Â | 0.046 |
 CT/TT | 264 | 0.61 | 0.24 | 0.99 | 0.001 |  |
 CC | 109 | −0.09 | −0.69 | 0.52 | 0.778 |  |
MTHFR (rs1801131) | Â | Â | Â | Â | Â | 0.735 |
 CC/CA | 127 | 0.36 | −0.17 | 0.89 | 0.186 |  |
 AA | 246 | 0.47 | 0.07 | 0.87 | 0.022 |  |
MTR (rs1805087) | Â | Â | Â | Â | Â | 0.627 |
 GG/GA | 120 | 0.34 | −0.19 | 0.86 | 0.206 |  |
 AA | 250 | 0.49 | 0.09 | 0.89 | 0.016 |  |
MTRR (rs162049) | Â | Â | Â | Â | Â | 0.599 |
 AA/AG | 261 | 0.48 | 0.10 | 0.86 | 0.013 |  |
 GG | 110 | 0.30 | −0.30 | 0.89 | 0.328 |  |
MTRR (rs10380) | Â | Â | Â | Â | Â | 0.423 |
 TT/CT | 79 | 0.66 | 0.02 | 1.30 | 0.043 |  |
 CC | 292 | 0.37 | −0.01 | 0.74 | 0.054 |  |
Drinking statusa | Â | Â | Â | Â | Â | 0.473 |
 Non-drinker | 223 | 0.33 | −0.08 | 0.74 | 0.118 |  |
 Former/Current | 150 | 0.56 | 0.06 | 1.06 | 0.028 |  |
Folate intakeb | Â | Â | Â | Â | Â | 0.736 |
 < 340 μg/day | 188 | 0.49 | 0.03 | 0.94 | 0.036 |  |
 ≥340 μg/day | 185 | 0.38 | −0.06 | 0.83 | 0.092 |  |