|  |  |  |  | 95% confidence interval |  | 95% confidence interval |  | ||
---|---|---|---|---|---|---|---|---|---|---|
MTHFR (rs1801133) | Drinking status | CRP (mg/dL) | N | Estimated mean methylation (%)a | Lower | Upper | βab | Lower | Upper | P value for trenda |
CT/TT | Never | 0.002–0.011 | 43 | 69.5 | 67.9 | 71.0 |  |  |  |  |
 |  | 0.012–0.023 | 33 | 70.5 | 68.9 | 72.2 |  |  |  |  |
 |  | 0.024–0.048 | 43 | 71.2 | 69.7 | 72.7 |  |  |  |  |
 |  | 0.049–0.491 | 45 | 70.6 | 69.0 | 72.1 |  |  |  |  |
 |  |  |  |  |  |  | 0.41 | −0.07 | 0.90 | 0.094 |
 |  | Log-transformed CRP |  |  |  |  | 0.28 | −0.25 | 0.81 | 0.307 |
 | Former/Current | 0.002–0.011 | 30 | 70.4 | 68.9 | 71.9 |  |  |  |  |
 |  | 0.012–0.023 | 26 | 70.3 | 68.6 | 72.0 |  |  |  |  |
 |  | 0.024–0.048 | 20 | 71.2 | 69.3 | 73.1 |  |  |  |  |
 |  | 0.049–0.491 | 24 | 72.8 | 71.1 | 74.6 |  |  |  |  |
 |  |  |  |  |  |  | 0.83 | 0.23 | 1.44 | 0.007 |
 |  | Log-transformed CRP |  |  |  |  | 0.88 | 0.26 | 1.50 | 0.006 |