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| Looping pattern | Right side | Left side | P value | ||
| Frequency | Percentage | Frequency | Percentage | ||
| Anterior loop | 42 | 14.0 | 71 | 23.7 | <0.0001 |
| Perpendicular pattern | 39 | 13.0 | 43 | 14.3 | |
| Straight pattern | 219 | 73.0 | 186 | 62.0 | |
