Table 2.
Subgroup | No. of studies | OR | 95%CI | p | I2 (%) |
---|---|---|---|---|---|
Regional | |||||
Europe | 2 | 2.37 | [0.47, 11.94] | 0.295 | 94.0 |
Iran | 4 | 2.25 | [0.92, 5.49] | 0.075 | 79.3 |
US | 2 | 1.19 | [0.95, 1.49] | 0.140 | 69.1 |
Sex | |||||
Male | 2 | 2.64 | [0.66, 10.56] | 0.169 | 83.3 |
Female | 2 | 1.26 | [1.08, 1.47] | 0.003 | 0.0 |
Other influencing factors | |||||
Hypertension | 2 | 0.85 | [0.31, 2.36] | 0.758 | 93.1 |
Smoking | 2 | 1.20 | [1.05, 1.37] | <0.001 | 34.3 |
Male versus Female | 2 | 1.11 | [1.00, 1.24] | 0.053 | 0.0 |
No., number; OR, odds ratio; 95%CI, 95% confidence intervals.