Table 2.
Global and regional T1, ECV, T2, and IBS values
| Global | Basal | Mid | Apical | p | |||
|---|---|---|---|---|---|---|---|
| T1 | (ms) | median (Q1-Q3) | 1235 (1199–1273) | 1220 (1193–1262) | 1219 (1179–1268) | 1252 (1168–1319) | 0.393 1 |
| *% abnormal | 90.00 | 53.33 | 50.00 | 66.67 | 0.5292 | ||
| ECV | (%) | median (Q1-Q3) | 28.05 (26.11–30.23) | 27.40 (25.23–28.78) | 26.69 (24.87–29.29) | 28.98 (26.65–32.51) | 0.008 1 |
| *% abnormal | 80.00 | 46.67 | 43.33 | 60.00 | 0.038 2 | ||
| T2 | (ms) | median (Q1-Q3) | 35.54 (34.61–38.23) | 35.82 (34.29–37.39) | 34.88 (34.03–36.97) | 36.85 (34.40–41.03) | 0.010 1 |
| *% abnormal | 6.90 | 3.45 | 0.00 | 3.45 | 0.3682 | ||
| IBS | (dB) | mean (SD) | 1.04 (2.80) | 1.99 (3.93) | 1.06 (3.73) | -0.79 (4.16) | 0.0801 |
| *% abnormal | 76.67 | 46.15 | 61.54 | 32.14 | 0.3682 |
One patient’s T2 values were missing, and two to four patients’ global or regional IBS values were missing and could not be evaluated. ECV, extracellular volume; IBS, integrated backscatter change from baseline to 6-year follow-up; *% abnormal, percentage of patients with abnormally high segmental values in a respective region; dB, decibel; p, p-value from 1Friedmans test or 2Cochran’s Q test for the difference between the basal, mid, and apical regions.