Table 2.
Distribution of VDR genotypes and gene variant alleles in KC patients versus control group.
| KC patients (n = 177) n (%) | Control (n = 85) n (%) | Relative risk of KC | |||||
|---|---|---|---|---|---|---|---|
| OR | 95% CI | P value | |||||
| Taq I | TT | 37 (20.9%) | 32 (37.6%) | 1 | - | - | R |
| Tt | 80 (45.2%) | 38 (44.7%) | 1.820 | 0.988 | 3.353 | 0.054 | |
| tt | 60 (33.9%) | 15 (17.6%) | 3.459 | 1.654 | 7.233 | 0.001 | |
| Tt + tt | 140 (79.1%) | 53 (62.4%) | 2.284 | 1.293 | 4.035 | 0.004 | |
| T | 154 (43.5%) | 102 (60.0%) | 1.948 | 1.343 | 2.825 | <0.001 | |
| t | 200 (56.5%) | 68 (40.0%) | |||||
| Apa I | AA | 64 (36.2%) | 26 (30.6%) | 1 | - | - | R |
| Aa | 85 (48.0%) | 42 (49.4%) | 0.822 | 0.457 | 1.478 | 0.513 | |
| aa | 28 (15.8%) | 17 (20.0%) | 0.669 | 0.314 | 1.424 | 0.297 | |
| Aa + aa | 113 (63.8%) | 59 (69.4%) | 0.778 | 0.447 | 1.354 | 0.374 | |
| A | 213 (60.2%) | 94 (55.3%) | 0.818 | 0.565 | 1.185 | 0.289 | |
| a | 141 (39.8%) | 76 (44.7%) | |||||
| Bsm I | BB | 61 (34.5%) | 23 (27.1%) | 1 | - | - | R |
| Bb | 75 (42.4%) | 42 (49.4%) | 0.673 | 0.365 | 1.239 | 0.204 | |
| bb | 41 (23.1%) | 20 (23.5%) | 0.773 | 0.376 | 1.585 | 0.482 | |
| BB + bb | 116 (65.5%) | 62 (72.9%) | 0.705 | 0.398 | 1.247 | 0.230 | |
| B | 197 (55.6%) | 88 (51.8%) | 0.855 | 0.592 | 1.234 | 0.403 | |
| b | 157 (44.4%) | 82 (48.2%) | |||||
The bold numbers refer to the statistically significant values.
VDR vitamin D receptors, KC keratoconus, OR odds ratio, CI Confidence interval, R reference.