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| Ethnicities - Actual (Expected) | |||||
|---|---|---|---|---|---|
| Cluster assignment | Asian | Black | Other | White | Sum |
| Anterior skull base | 2 (2.3) | 4 (1.0) | 4 (0.3) | 10 (26.1) | 20 |
| Parieto-occipital | 7 (2.3) | 5 (1.0) | 8 (0.3) | 12 (26.1) | 32 |
| Peri-torcular | 6 (2.3) | 12 (1) | 1 (0.3) | 18 (26.1) | 37 |
