| Heading | Useless (%) | Neutral (%) | Useful (%) |
| Identity of parents | 6.3 | 5.6 | 88.0 |
| Parents’ blood type | 4.9 | 8.5 | 86.6 |
| Hemoglobin electrophoresis of parents | 4.9 | 6.3 | 88.7 |
| Identity of siblings | 9.9 | 28.2 | 62.0 |
| Family history (hereditary diseases) | 6.3 | 11.3 | 82.4 |
| Allergies | 11.3 | 18.3 | 70.4 |
| Blood transfusion data | 28.2 | 30.3 | 41.5 |
| Radiological examination data | 36.6 | 27.5 | 35.9 |
| Summaries of consultations for various conditions | 4.9 | 5.6 | 89.4 |