| previously | 3 | degree |
| as a cause of familial erythrocytosis | 3 | other |
| in less studied populations | 2 | location |
| mutation → be → unknown | 21 |
| mutation → remain → unknown | 4 |
| negative | neutral | positive |
| 0.298 | 0.631 | 0.071 |
| Raw frequency | 25 |
| Normalized frequency | 0.429 |
| Modifier score | 0.500 |
| Perplexity | 229.666 |