| for sickle cell disease | 5 | other |
| largely | 4 | degree |
| for the kell antigen | 4 | other |
| baby → be → positive | 78 |
| baby → be born → positive | 3 |
| negative | neutral | positive |
| 0.286 | 0.530 | 0.184 |
| Raw frequency | 81 |
| Normalized frequency | 0.466 |
| Modifier score | 0.667 |
| Perplexity | 253.511 |