Table 1. Numbers of patients according to the age at diagnosis.
| Age at diagnosis | Total number of patients | Males | Females | Number with known phenotype | Percentage with a CHD | Percentage with an isolated feature |
|---|---|---|---|---|---|---|
| Newborns (aged <1 month) | 143 | 56 | 56 | 140 | 78.60% | 16.40% |
| Infants (aged 1 month to 2 years) | 166 | 66 | 67 | 161 | 63.10% | 15.50% |
| Young children (aged 3–6 years) | 119 | 46 | 42 | 115 | 29.60% | 13.00% |
| Older children (aged 7–12 years) | 100 | 32 | 36 | 96 | 43.80% | 11.50% |
| Adolescents (aged 13–19 years) | 64 | 25 | 21 | 59 | 32.20% | 15.30% |
| Adults (aged ≥20 years) | 154 | 36 | 77 | 118 | 34.70% | 23.70% |
| TOTAL | 746 | 260 | 299 | 688 | 48.50% | 25.00% |