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

Data presented as mean ± SD. * n = 9. CoV Coefficient of variability, ICC Intraclass correlation coefficient, BA Bland-Altman