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Comparison of Adverse Effects in the Study Groups.
| Adverse Effects | Active Group (n = 17) N (%) | Sham Group (n = 17) N (%) | Relative risk (RR) |
| Numbness at stimulation site | 5 (29.41) | 2 (11.76)5 | 2.5 |
| Burning at stimulation site | 5 (29.41) | 1 (5.88) | 5 |
| Pain | 3 (17.64) | 2 (11.76) | 1.5 |
| Headache | 1 (5.88) | 1 (5.88) | 1 |
| Tingling sensation | 1 (5.88) | 2 (11.76) | 0.5 |
| Sedation | 2 (11.76) | 0 (0.00) | – |
