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Results of meta-analysis.
| Comparison | Subgroup | No. studies | OR (95% CI) | P Value | I2 (%) |
|---|---|---|---|---|---|
| 4G/4G vs. 4G/5G+5G/5G | Overall | 22 | 1.89 (1.34–2.67) | 0.0003 | 81 |
| 4G/4G vs. 4G/5G+5G/5G | Asian | 4 | 1.47 (0.84–2.59) | 0.18 | 86 |
| 4G/4G vs. 4G/5G+5G/5G | Caucasian | 18 | 2.23 (1.44–3.46) | 0.0003 | 79 |
