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Frequency of specific phenotypes by group
| Phenotype | Group 1 | Group 2 | p value | |
|---|---|---|---|---|
| Position | Proximal | 167 (35%) | 107 (32%) | 0.47 |
| Distal | 313 (65%) | 224 (68%) | ||
| Laterality | Bilateral | 137 (28%) | 80 (24%) | 0.21 |
| Unilateral | 360 (72%) | 258 (76%) | ||
| Presentation | Early | 236 (48%) | 142 (42%) | 0.07 |
| Late | 255 (52%) | 198 (58%) |
