Reference ranges of myocardial T1 and T2 mapping in healthy Chinese adults: a multicenter 3T cardiovascular magnetic resonance study

Table 5 Intra-observer and inter-observer reproducibility of T1 and T2 values

	Bias	SD of bias	95% LOA	CoV (%)	ICC	p value
Intra-observer
T1 base	4.63	7.19	(− 18.73 to 9.46)	2.6	0.962	< 0.001
T1 middle	− 5.19	6.14	(− 17.23 to 6.85)	2.6	0.970	< 0.001
T1 apex	− 4.23	8.19	(− 20.28 to 11.83)	3.5	0.976	< 0.001
T1 global	− 4.54	4.14	(− 12.65 to 3.57)	2.4	0.978	< 0.001
T2 base	− 0.34	0.80	(− 1.90 to 1.20)	6.2	0.926	< 0.001
T2 middle	− 0.58	0.94	(− 2.42 to 1.27)	6.6	0.892	< 0.001
T2 apex	− 0.38	0.86	(− 2.06 to 1.30)	7.9	0.948	< 0.001
T2 global	− 0.45	0.72	(− 1.87 to 0.97)	6.3	0.930	< 0.001
Inter-observer
T1 base	− 5.58	9.23	(− 23.68 to 12.52)	2.6	0.939	< 0.001
T1 middle	− 4.92	7.62	(− 19.84 to 10.01)	2.7	0.967	< 0.001
T1 apex	− 3.72	9.20	(− 21.75 to 14.32)	3.6	0.973	< 0.001
T1 global	− 4.58	5.29	(− 14.95 to 5.78)	2.5	0.972	< 0.001
T2 base	− 0.35	0.83	(− 1.98 to 1.28)	6.1	0.917	< 0.001
T2 middle	− 0.65	1.03	(− 2.67 to 1.38)	6.6	0.869	< 0.001
T2 apex	− 0.37	0.90	(− 2.14 to 1.40)	7.9	0.943	< 0.001
T2 global	− 0.47	0.78	(− 2.00 to 1.06)	6.2	0.918	< 0.001

LOA limit of agreement, CoV coefficient of variation, ICC intra-class correlation coefficient, SD standard deviation

ISSN: 1532-429X