Table 2.
Genotype and allele frequencies.
| Marker | Genotype frequencies | Allele frequencies | |||||
|---|---|---|---|---|---|---|---|
| MTHFR C677T | CC | CT | TT | Total | C | T | Total |
|
| |||||||
| Case | 170 (45.1%) | 174 (46.2%) | 33 (8.7%) | 377 | 514 (68.2%) | 240 (31.8%) | 754 |
| Control | 175 (44.5%) | 183 (46.6%) | 35 (8.9%) | 393 | 533 (67.8%) | 253 (32.2%) | 786 |
| Test statistic | χ 2 = 0.03, P = 0.99 (α = 0.05) | χ 2 = 0.02, P = 0.88 (α = 0.05) | |||||
|
| |||||||
| MTHFR A1298C | AA | AC | CC | Total | A | C | Total |
|
| |||||||
| Case | 165 (44.8%) | 151 (41.0%) | 52 (14.2%) | 368 | 481 (65.4%) | 255 (34.6%) | 736 |
| Control | 162 (42.0%) | 173 (44.8%) | 51 (13.2%) | 386 | 497 (64.4%) | 275 (35.6%) | 772 |
| Test statistic | χ 2 = 1.10, P = 0.58 (α = 0.05) | χ 2 = 0.16, P = 0.69 (α = 0.05) | |||||
|
| |||||||
| MTRR A66G | AA | AG | GG | Total | A | G | Total |
|
| |||||||
| Case | 103 (28.6%) | 192 (53.3%) | 65 (18.1%) | 360 | 398 (55.3%) | 322 (44.7%) | 720 |
| Control | 95 (26.5%) | 189 (52.8%) | 74 (20.7%) | 358 | 379 (52.9%) | 337 (47.1%) | 716 |
| Test statistic | χ 2 = 0.92, P = 0.63 (α = 0.05) | χ 2 = 0.79, P = 0.37 (α = 0.05) | |||||
|
| |||||||
| MTHFD1 G1958A | GG | AG | AA | Total | G | A | Total |
|
| |||||||
| Case | 119 (32.7%) | 168 (46.2%) | 77 (21.1%) | 364 | 406 (55.8%) | 322 (44.2%) | 728 |
| Control | 104 (28.9%) | 183 (50.8%) | 73 (20.3%) | 360 | 391 (54.3%) | 329 (45.7%) | 720 |
| Test statistic | χ 2 = 1.73, P = 0.42 (α = 0.05) | χ 2 = 0.31, P = 0.58 (α = 0.05) | |||||