Table 1.
Patient data presented for the whole cohort in the hyperacute phase (all hyperacute patients) and for the subset who also received a follow-up MRI scan. Ranges presented in the table in parentheses are in the format: median (minimum – maximum).
| Variable | All Hyperacute Data | Subset with Both Hyperacute and Follow-up Scans |
|---|---|---|
| Patients, n (% overall cohort) | 38 (100%) | 16 (42.1%) |
| Female, n (% group) | 12 (31.6%) | 5 (31.3%) |
| Scan site, n (% group) | ||
| Bristol | 19 (50.0%) | 3 (18.8%) |
| Glasgow | 15 (39.5%) | 11 (68.8%) |
| Oxford | 4 (10.5%) | 2 (12.5%) |
| Age | 68 (31 – 87) | 68 (45 – 87) |
| Received r-tPA before MRI, n(% group) | 25 (65.8%) | 12 (75.0%) |
| Median time from rtPA to MRI (h:min) | 3:17 (0:29 – 7:18) | 4:12 (0:38 – 7:18) |
| Median time from onset to MRI (h:min) | 5:38 (2:25 – 9:29) | 6:52 (3:04 – 9:29) |
| Days from onset to follow-up MRI | - | 1 (1 – 4) |
| NIHSS† on admission | 6 (1 – 28) | 8.5 (1 – 21) |
| Stroke subtype‡, n (% group) | ||
| Lacunar (LACS) | 15 (39.5%) | 6 (37.5%) |
| Partial Anterior Circulation (PACS) | 11 (28.9%) | 5 (31.3%) |
| Posterior Circulation (POCS) | 4 (10.5%) | 1 (6.3%) |
| Total Anterior Circulation (TACS) | 8 (21.1%) | 4 (25.0%) |
| Left hemisphere stroke | 15 (39.5%) | 6 (37.5%) |
| ADC lesion volume [cm3] | ||
| Hyperacute | 1.95 (0.04 – 97.51) | 3.57 (0.12 – 20.50) |
| Follow-up | - | 4.01 (0 – 44.53) |
†
Scores on the National Institutes of Health Stroke Scale (NIHSS) range 0 – 42, with higher scores indicating greater severity.
‡
Strokes classified according to the Oxford Stroke Classification Scale (Bamford et al., 1991)