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| Pain intensity | Group 1 | Group 2 | Group 3 |
|---|---|---|---|
| Frequency (%) | Frequency (%) | Frequency (%) | |
| Without pain | 31 (62%) | 28 (56%) | 1 (2%) |
| With pain | 19 (38%) | 22 (44%) | 49 (98%) |
| Total | 50 (100%) | 50 (100%) | 50 (100%) |
