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IQ scores of different anatomic levels for group 1 and group 2
| IQ score | Group 1 | Group 2 | P-value |
|---|---|---|---|
| Helical | (n) | (n) | |
| 1 | 0 | 0 | 0.03 |
| 2 | 0 | 1 | |
| 3 | 12 | 13 | |
| 4 | 17 | 4 | |
| IQ score | |||
| High-pitch | |||
| 1 | 1 | 0 | 0.07 |
| 2 | 5 | 0 | |
| 3 | 11 | 4 | |
| 4 | 12 | 14 | |
| P-value | 0.67 | 0.37 |
*IQ score: 1 = non-diagnostic; 2 = diagnostic; 3 = good and 4 = excellent
