Data grouped according to outcome
| Variable | Without events (n=25) | With events (n=15) |
| Age (years) | 6 (5), 0.4–14 | 8 (7), 0.5–20 |
| Sex (male) | 56% | 46% |
| Identifiable cause | 44% | 40% |
| Cardiothoracic index (%) | 56 (17), 40–70 | 67 (6), 55–77 |
| Indexed end diastolic diameter (mm/m2) | 62 (23), 31–130 | 75 (40), 33–163 |
| Indexed end systolic diameter (mm/m2) | 50 (21), 23–110 | 65 (36), 29–147 |
| Echographic fractional shortening (%) | 19 (4), 12–27 | 13 (3), 8–18 |
| Cardiac MIBG uptake (H/M ratio) | 1.86 (0.17), 1.58–2.2 | 1.35 (0.14), 1.1–1.54 |
| MIBG washout rate (%) | 31 (10), 11–61 | 30 (13), 10–62 |
| Noadrenaline concentration (pg/ml) | 166 (77) | 308 (415) |
| Follow up period (months) | 17 (9), 6–38 | 5 (3)*, 1–11 |
Unless specified, values are mean (SD), range.