| Onset (hours) | Age groups (years) | Total | ||||
|---|---|---|---|---|---|---|
| 0-4 | 5-9 | 10-14 | 15-64 | 65+ | ||
| <2 | 86.3% | 93.1% | 97.4% | 87.8% | 77.9% | 88.9% |
| ≥2, <4 | 9.2% | 3.1% | 1.3% | 6.6% | 7.0% | 5.7% |
| ≥4, <8 | 0.8% | 1.6% | 0.0% | 2.0% | 8.1% | 2.1% |
| ≥8, <24 | 0.8% | 0.6% | 0.0% | 0.9% | 2.3% | 0.8% |
| ≥24 | 3.1% | 1.6% | 1.3% | 2.7% | 4.7% | 2.5% |
| Mean time (h) | 2.04 | 1.60 | 1.41 | 1.98 | 2.97 | 1.92 |