Table 2.
Summary of different comparative results.
| N | Cases/controls | TT vs. CC | CT vs. CC | Dominant model | Recessive model | |
| Variables | OR(95%CI) I2 | OR(95%CI) I2 | OR(95%CI) I2 | OR(95%CI) I2 | ||
| Total | 7 | 1890/2929 | 0.81(0.64–1.04) 0.0% | 0.92(0.81–1.05) 0.0% | 0.90(0.80–1.02) 0.0% | 0.84(0.66–1.06) 0.0% |
| Ethnicity | ||||||
| Asian | 1 | 153/207 | 1.02(0.55–1.89) / | 1.14(0.70–1.85) / | 1.10(0.69–1.76) / | 0.94(0.55–1.60) / |
| Caucasian | 6 | 1737/2722 | 0.78(0.60–1.02) 0.0% | 0.91(0.80–1.04) 0.0% | 0.89(0.79–1.01) 0.0% | 0.82(0.63–1.06) 0.0% |
| Disease type | ||||||
| UC | 3 | 562/1118 | 0.86(0.59–1.24) 0.0% | 0.84(0.67–1.05) 28.4% | 0.90(0.74–1.11) 11.1% | 0.95(0.67–1.35) 0.0% |
| CD | 6 | 1325/2538 | 0.75(0.56–1.02) 0.0% | 0.68(0.48–0.97) 82.4% | 0.78(0.55–1.10) 78.9% | 0.79(0.59–1.05) 12.3% |
N: number; I2: Inconsistency index; CI: confidence interval; OR: odds ratio. When I2 > 50%, the random effects model was used,or else the fixed effects model was used.