Age at diagnosis
| Age at diagnosis | Number of patients | Number of patients |
|---|---|---|
| Inherited (178) (79 index cases plus a further 99 family members) | Sporadic (342) | |
| Birth–1 month | 37 (20.8%) | 102 (29.8%) |
| >1 month–12 month | 39 (22%) | 90 (26.3%) |
| >1 year–2 years | 8 (4.5%) | 25 (7.3%) |
| >2 years–3 years | 7 (3.9%) | 19 (5.6%) |
| >3 years–4 years | 5 (2.8%) | 12 (3.5%) |
| >4 years–5 years | 10 (5.6%) | 12 (3.5%) |
| >5 years–10 years | 32 (18%) | 28 (8.2%) |
| >10 years | 28 (15.7%) | 9 (2.6%) |
| No information | 12 (6.7%) | 45 (13.2%) |