Clinical characteristics of study population
| Characteristics (N=60) | All | ICH | AIS |
| No. of patients | 60 | 30 | 30 |
| Age, median (IQR) | 60.0 (53.0–69.8) | 58.0 (46.5–66.0) | 63.5 (56.5–70.0) |
| Sex | |||
| Male | 44.0 (73.3) | 21.0 (70.0) | 23.0 (76.7) |
| Female | 16.0 (26.7) | 9.0 (30.0) | 7.0 (23.3) |
| Time from LKN to 0.23-T MRI, median (IQR)* | 9.2 (5.1–12.2) | 10.7 (6.0–15.0) | 8.1 (4.5–12.1) |
| Time from LKN to CT, median (IQR)* | 5.9 (4.0–11.0) | 5.6 (4.0–10.6) | 6.3 (3.9–12.7) |
| Time from LKN to 3-T MRI, median (IQR)† | 3.2 (1.1–5.5) | – | 3.2 (1.1–5.5) |
| Baseline NIHSS, median (IQR) | 2.0 (0.0–7.8) | 2.0 (0.0–9.0) | 2.0 (1.0–5.0) |
| Diameter of lesion (mm), median (IQR) | 13.6 (4.7–28.1) | 25.0 (11.1–30.3) | 5.3 (4.3–13.9) |
| Maximum diameter less than 5 mm | 18.0 (30.0) | 3.0 (10.0) | 15.0 (50.0) |
| Acute haemorrhagic stroke (N=30) | |||
| Basal ganglia | 10.0 (33.3) | ||
| Temporal | 3.0 (10.0) | ||
| Parietal | 1.0 (3.3) | ||
| Frontal | 1.0 (3.3) | ||
| Occipital | 4.0 (13.3) | ||
| Brainstem | 2.0 (6.7) | ||
| Other‡ | 9.0 (30.0) | ||
| Acute ischaemic stroke (N=30) | |||
| Territory | |||
| Anterior circulation | 17.0 (56.7) | ||
| Posterior circulation | 11.0 (36.7) | ||
| Anterior and posterior circulation | 2.0 (6.7) | ||
| Lacunar infarction | 11.0 (36.7) |
*Time from LKN to 0.23-T MRI and to CT were measured by hours.
†Time from LKN to 3-T MRI was measured by days.
‡Of the nine patients with other bleeding, eight were cerebral lobe haemorrhage combined with subarachnoid haemorrhage and one was subdural haematoma.
AIS, acute ischaemic stroke; ICH, intracerebral haemorrhage; LKN, last known normal; NIHSS, National Institutes of Health Stroke Scale.