Table 3 Test-retest reliability, interrater and intrarater agreement of global rest native T1, stress T1 and ΔT1
Parameter | Study 1 | Study 2 | CoV | ICC (95% CI) | Bias ± SD of bias | BA Limits of Agreement |
|---|---|---|---|---|---|---|
Test-retest reliability (n = 10) | ||||||
 Rest T1 | 1273 ± 48 | 1264 ± 41 | 1.2% | 0.79 (0.38; 0.94) | 9.4 ± 29.3 | −48.0; 66.8 |
 Stress T1* | 1322 ± 47 | 1305 ± 53 | 1.5% | 0.69 (0.16; 0.92) | 16.4 ± 38.3 | −58.6; 91.5 |
 ΔT1* | 3.6 ± 1.8 | 3.0 ± 2.0 | 27.4% | 0.55 (− 0.10; 0.88) | 0.6 ± 1.8 | −3.0; 4.1 |
Interrater agreement (n = 15) | ||||||
 Rest T1 | 1272 ± 40 | 1274 ± 37 | 0.3% | 0.98 (0.95; 0.99) | −1.5 ± 7.0 | − 15.2; 12.3 |
 Stress T1 | 1313 ± 44 | 1316 ± 46 | 0.3% | 0.99 (0.96; 1.00) | − 2.4 ± 6.9 | − 16.0; 11.2 |
 ΔT1 | 3.2 ± 1.9 | 3.3 ± 1.7 | 9.6% | 0.94 (0.83; 0.98) | −0.1 ± 0.6 | −1.3; 1.2 |
Intrarater agreement (n = 15) | ||||||
 Rest T1 | 1272 ± 40 | 1274 ± 38 | 0.2% | 0.99 (0.97; 1.00) | −1.4 ± 5.4 | −12.0; 9.2 |
 Stress T1 | 1313 ± 44 | 1316 ± 46 | 0.3% | 0.98 (0.95; 0.99) | − 2.5 ± 8.5 | − 19.2; 14.2 |
 ΔT1 | 3.2 ± 1.9 | 3.3 ± 1.8 | 10.3% | 0.94 (0.83; 0.98) | −0.1 ± 0.7 | −1.4; 1.3 |