| Variables | Side effects | OR (95% CI) | p-value | |
| Yes | No | |||
| Splitting (in Gray) |
|
|
|
|
| 2 | 105 (65.0) | 45 (50.0) | 1.86 (1.11 - 3.11) |
|
| 2.5 | 60 (35.0) | 45 (50.0) | 0.54 (0.32 - 0.90) | 0.01 |