Results of the quantitative analysis
| ROIa | GM | WM | Suspected Penumbra | Suspected Core | ||
|---|---|---|---|---|---|---|
| Absolute | Absolute | Relative | Absolute | Relative | Absolute | |
| CBFDC(mL/100 g/min) | 65 ± 4.7 | 30 ± 2.7 | .48 ± .11 | 29 ± 6.6 | .21 ± .08 | 12 ± 4.2 |
| CBFMS (mL/100 g/min) | 61 ± 2.4 | 29 ± 1.7 | .59 ± .12 | 32 ± 6.2 | .18 ± .08 | 9 ± 4.0 |
| Relative difference DC-MS | +6%b | +5%b | −.11b | −12%b | +.03b | +24%b |
| Bland-Altman plot slope | Yesc | Yesc | No | No | No | No |
| Potentially relevant differences | 5% | 5% | 17% | 7% | 10% | 10% |
| CBVDC (mL/100 g) | 3.5 ± .2 | 1.9 ± .2 | .92 ± .16 | 2.9 ± .6 | .37 ± .15 | 1.1 ± .44 |
| CBVMS (mL/100 g) | 3.6 ± .2 | 1.9 ± .1 | .80 ± .11 | 2.6 ± .3 | .30 ± .12 | .9 ± 0.35 |
| Relative difference DC-MS | −4%b | −2% | +.12b | +11%b | +.17b | +20%b |
| Bland-Altman plot slope | Yesc | Yesc | Yesc | Yesc | Yesc | Yesc |
| Potentially relevant differences | 7% | 5% | 26% | 12% | 12% | 14% |
| MTT | 3.3 ± .3s | 4.0 ± .6s | 2.3 ± .67 | 7.6 ± 2.2s | 2.1 ± .66 | 6.9 ± 2.1s |
| TTD | 3.7 ± .6s | 4.8 ± 1.0s | 2.9 ± .87 | 10.6 ± 3.1s | 3.7 ± 1.0 | 13.1 ± 3.5s |
| TTP | 8.1 ± 2.4s | 9.3 ± 2.5s | 1.7 ± .33 | 13.4 ± 3.3s | 1.8 ± .37 | 14.2 ± 3.7s |
a ROI values are mean ± SD.
b Statistically significant difference of DC and MS medians (Wilcoxon signed rank test, P < .05).
c Statistically significant relationship of the method difference (DC − MS) versus the size of the measurement (DC + MS)/2 (Wilcoxon test, P < .05). “Yes” indicates a proportional difference; “no” indicates a systematic nonproportional or random difference.