Table 1.
Baseline characteristics (n = 524)
| Variables | N | Statistics |
|---|---|---|
| Demographic characteristics | ||
| Age at first echo (years) | 524 | 7.7 (3.7–12.0) |
| Gender | 524 | |
| Female | 235 (44.8%) | |
| Reported race | 157 | |
| Afro-Caribbean | 6 (3.8%) | |
| Caucasian | 131 (83.4%) | |
| Mixed | 7 (4.5%) | |
| Other | 13 (8.3%) | |
| Phenotype-positive at first screening | 524 | 52 (9.9%) |
| Symptomatic at screeninga | 523 | 6 (1.1%) |
| Screened before 12 years old | 524 | 392 (74.8%) |
| Phenotype-positive at last follow-up | 524 | 80 (15.3%) |
| Family history | ||
| Family history of sudden cardiac death | 524 | 198 (37.8%) |
| Family history of ICD | 524 | 150 (28.6%) |
| Youngest family member with SCD | 198 | |
| >60 years old | 11 (5.6%) | |
| 40–59 years old | 52 (26.3%) | |
| 25–39 years old | 74 (37.4%) | |
| <25 years old | 61 (30.8%) | |
| Closest affected family member | 522 | |
| First degree (mother/father/sibling) | 468 (89.7%) | |
| Second degree (grand-parent, uncle/aunt) | 47 (9.0%) | |
| Third or fourth degree | 7 (1.3%) |
a
Symptoms included: palpitations (1), chest pain (1), murmur (2), syncope (1), syncope, and palpitations (1).