| Overall | Adults | Children | |
| No/year, mean (SD) | 16.3 (22.9) | 10.0 (12.1) | 25.5 (31.4) |
| Duration, mean hours (SD) | 55 (43.8) | 55.3 (39.9) | 54.5 (50.7) |
| Vomiting freq, mean (SD) | 4.1 (2.6) | 3.5 (1.7) | 4.6 (3.3) |
| Duration of recovery phase, mean hours (SD) | 53.2 (47) | 59.1 (43.6) | 45 (53.2) |