Table 2.
Characteristics for the study population comparing those with and without a mismatch ratio greater than 1.2
| All patients (n=376) | Mismatch ratio >1.2 (n=156) | Mismatch ratio <1.2 (n=220) | Univariate analysis (P) | Multivariate analysis (P) | Multivariate analysis - excluding NIHSS (P) | |
|---|---|---|---|---|---|---|
| Age, median (IQR) | 71 (26-103) | 72 (26-103) | 70 (26-98) | 0.252 | ||
| Sex, % Female** | 48.93% | 55.79% | 44.09% | 0.030 | 0.068 | 0.042 |
| NIHSS, median (IQR) | 3 (0-35) | 5 (0-32) | 2 (0-35) | <0.001 | <0.001 | |
| PWI lesion volume (mL), mean (SD) | 11.98 (0-211.29) | 26.31 (0.02-211.29) | 1.65 (0-107.51) | |||
| DWI lesion volume (mL), mean (SD) | 7.93 (0-119.77) | 5.96 (0-91.89) | 38.77 (0.22-119.77) | |||
| Mismatch ratio, median (IQR) | 6.16 (0.73-296) | 6.5 (1.21-296) | 0.99 (0.73-1.15) | |||
| Chronic microbleeds | 10.12% | 11% | 9% | 0.15 | ||
| Fazekas score, median | 1 | 2 | 1 | 0.68 | ||
| Time windows | ||||||
| Last normal to MRI (min) | 703.82 (88-1797) | 692.51 | 708.78 | 0.675 | ||
| Symptom discovery to MRI | 444.467 (0-1797) | 391.92 | 479.193 | 0.012 | 0.356 | 0.020 |
| Estimated onset to MRI | 564.49 (0-1797) | 526.60 (0-1797) | 590.02 (88-1570) | 0.095 | 0.610 | 0.155 |
**2 Patients were excluded due to sex not being specified, both had a mm-ratio >1.2. IQR: Interquartile rage, NIHSS: National Institutes of Health Stroke Scale, PWI: Perfusion-weighted imaging, DWI: Diffusion-weighted imaging, MRI: Magnetic resonance imaging