Population classification of nominees by source
| Genet PWS | Clinic PWS | Not seen | Non-PWS | % positive of those seen | |
| Genet Lab | 32 | 0 | 8 | 0 | 100 |
| Doctors | 87 | 5 | 23 | 15 | 86 |
| PWSA | 36 | 1 | 13 | 10 | 79 |
| Relative | 6 | 0 | 1 | 13 | 32 |
| Head teacher | 8 | 0 | 2 | 0 | 100 |
| Social Services | 10 | 1 | 3 | 2 | 85 |
| Home/centre manager | 1 | 0 | 0 | 1 | 50 |