Demographic data (N=36)
| Variables | n (%) |
| Gender | |
| Male | 24 (67) |
| Female | 12 (33) |
| Onset age (years), mean (SD, range) | 13.1 (4.4, 3.8–20.0) |
| <10 | 7 (19) |
| 10–20 | 29 (81) |
| Family history of SCA | 9 (25) |
| Prior events | |
| Syncope | 13 (36) |
| Dyspnoea | 1 (3) |
| Palpitation | 1 (3) |
| Activity at time of the arrest | |
| Exercise | 14 (39) |
| Sleep | 3 (8) |
| Daily activity | 13 (36) |
| Other | 6 (17) |
| Witnessed events | 36 (100) |
| Setting of SCA | |
| School | 11 (31) |
| Public | 12 (33) |
| Home | 7 (19) |
| Hospital | 6 (17) |
| Bystander CPR | |
| Teacher/school nurse | 12 (33) |
| Parents | 8 (22) |
| Others | 10 (28) |
| No bystander CPR | 6 (17) |
| Onset symptoms | |
| SCA | 30 (83) |
| Syncope with VT | 6 (17) |
| Initial rhythm | |
| VF | 20 (56) |
| VT | 15 (42) |
| Asystole | 1 (3) |
CPR, cardiopulmonary resuscitation; SCA, sudden cardiac arrest; VF, ventricular fibrillation; VT, ventricular tachycardia.