Numbers, gender differences and ages of people with PWS identified by county
| Beds | Berks | Bucks | Camb | Norf | North | Oxon | Suff | |
| Male | 7 | 4 | 7 | 10 | 9 | 6 | 5 | 7 |
| Female | 4 | 6 | 6 | 3 | 3 | 2 | 4 | 5 |
| Not stated | 1 | 2 | 1 | 1 | 3 | |||
| Totals | 11 | 11 | 15 | 14 | 13 | 11 | 9 | 12 |
| Age (years) | ||||||||
| 0–2 | — | 2 | 1 | — | — | — | — | 1 |
| 3–5 | — | — | 2 | 3 | 1 | — | — | — |
| 6–8 | 2 | 4 | 2 | 3 | — | — | 1 | — |
| 9–11 | — | 1 | 1 | 1 | — | — | — | 1 |
| 12–14 | 1 | 1 | 2 | 1 | — | — | 1 | — |
| 15–17 | — | 2 | 2 | 3 | — | 2 | 2 | 2 |
| 18–20 | 1 | — | 1 | 1 | 3 | 1 | — | 2 |
| 21–23 | 1 | — | — | — | 3 | — | — | 1 |
| 24–26 | 2 | — | 1 | — | — | 1 | 3 | — |
| 27–29 | 1 | — | 1 | 1 | 1 | 3 | — | 1 |
| 30–32 | — | — | 1 | — | 1 | — | 1 | — |
| 33–35 | 1 | — | — | — | — | 2 | — | 2 |
| 36–38 | 1 | 1 | 1 | 1 | 1 | — | 1 | 1 |
| 39–41 | — | — | — | — | 3 | 1 | — | — |
| 42–44 | — | — | — | — | — | — | — | — |
| 45–47 | 1 | — | — | — | — | 1 | — | 1 |