Table 3. Summary of pooled effects.
Number of studies | Homozygous | Recessive | Number of studies | Dominant | Co-dominant | |||||||||
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OR (95%CI) p value | Phet | I2 | OR (95%CI) p value | Phet | I2 | OR (95%CI) p value | Phet | I2 | OR (95%CI) p value | Phet | I2 | |||
Overall | 9 | 5.55 (1.86-16.55) 0.002 | 0.03 | 52 | 3.23 (1.86-5.59) <0.0001 | <0.0001 | 85 | 10 | 3.14 (1.91-5.17) <0.0001 | <0.0001 | 83 | 3.14 (1.93-5.10) <0.0001 | <0.0001 | 86 |
HWE only | 8 | 9.45 (2.91-30.71) 0.0002 | 0.02 | 57 | 7.19 (2.61-19.82) <0.0001 | 0.09 | 43 | 9 | 2.99 (1.78-5.02) <0.0001 | <0.0001 | 85 | 3.08 (1.84-5.14) <0.0001 | <0.0001 | 88 |
Italian studies only | 7 | 11.12 (2.44-50.71) 0.002 | 0.02 | 59 | 8.72 (2.27-33.53) 0.002 | 0.07 | 49 | 8 | 3.83 (2.28-6.45) <0.0001 | <0.0001 | 76 | 3.86 (2.40-6.21) <0.0001 | <0.0001 | 78 |
Brazil* | 1 | 2.35 (0.39-14.34) | - | - | 1.95 (0.32-11.83) | - | - | 1 | 2.28 (1.35-3.85) | - | - | 2.05 (1.28-3.29) | - | - |
Poland* | 1 | 1.84 (0.45–7.50) | - | - | 1.83 (0.45-7.42) | - | - | 1 | 1.08 (0.70-1.67) | - | - | 1.11 (0.75-1.65) | - | - |
* Odds ratio and 95% confidence interval are study-specific values.
OR: odds ratio; 95%CI: 95% confidence interval; Phet: p value for heterogeneity; I2 are expressed in %.