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Pooled risk factors of senile pruritus
| No. | Risk factors | OR | 95% CI | P value | Heterogeneity | |
| I2 (%) | P value | |||||
| 1 | Smoking | 1.26 | 1.14 to 1.40 | 0.000 | 0% | 0.673 |
| 2 | Excessive drinking | 25.03 | 18.28 to 34.25 | 0.000 | 0% | 0.980 |
| 3 | Monophagism | 1.22 | 1.12 to 1.33 | 0.000 | 0% | 0.926 |
