Table 3.

Inter-observer repeatability for patients with myocardial infarction (infarct), hypertrophic cardiomyopathy (non-fibrosis) or dilated cardiomyopathy.

Myocardial infarction (n = 20)	First observer	Second observer	Mean Difference	P value	LCC (95% CI)	Bland–Altman (95% LoA)	CoV (%)
Native T1 (ms) infarct	1395 ± 72 [1246–1501]	1390 ± 74 [1222–1484]	−4.4	0.83	0.98 (0.70–0.97)	−21.4 (−32.2, −10.5) to 28.9 (18.1, 39.80)	5.2
30-min post manganese T1 (ms) infarct	1137 ± 79 [996–1280]	1141 ± 74 [1001–1271]	+ 3.3	0.88	0.99 (0.97–0.99)	−23.5 (−32.5, −14.7) to 17.6 (8.7, 26.5)	6.9
Manganese uptake (Ki, mL/100 g of tissue/min) infarct	5.3 ± 1.4 [2.0–7.3]	5.2 ± 1.3 [2.9–7.3]	−0.08	0.79	0.98 (0.96–0.99)	− 0.7 (−1.03, −0.4) to 0.9 (0.5, 1.2)	9.9

Hypertrophic cardiomyopathy (n = 18)
Native T1 (ms) non fibrosis	1185 ± 35 [1104–1237]	1189 ± 33 [110–1206]	+ 3.9	0.88	0.97 (0.84–0.98)	−26.8 (−37.6, −16.2) to 19.1 (8.5, 27.7)	3.1
30-min post manganese T1 (ms) non fibrosis	922 ± 44 [838–994]	917 ± 45 [844–975]	−4.8	0.82	0.97 (0.94–0.99)	− 11.6 (−19.8, −3.4) to 22.7 (914.5, 31.0)	4.3
Manganese uptake (Ki, mL/100 g of tissue/min) non fibrosis	7.6 ± 1.6 [4.0–9.9]	7.4 ± 1.6 [3.09–9.8]	−0.2	0.89	0.98 (0.96–0.99)	− 0.3 (−0.6, −1.0) to 0.7 (0.5, 0.9)	8.2

Dilated cardiomyopathy (n = 10)
Native T1 (ms)	1208 ± 60 [1164–1252]	1206 ± 68 [1157–1256]	−2.2	0.94	0.98 (0.94–0.99)	−17.7 (−31.2, −4.1) to 20.3 (6.7, 33.20)	5.8
30-min post manganese T1 (ms)	981 ± 58 [923–1039]	977 ± 57 [920–1034]	−4.6	0.88	0.98 (0.69–0.92)	− 20.6 (−32.3, −8.9) to 12.4 (90.65, 24.1)	6.5
Manganese uptake (Ki, mL/100 g of tissue/min)	7.2 ± 1.5 [6.2–8.3]	7.1 ± 1.3 [6.2–8.0]	−0.1	0.90	0.95 (0.79–0.99)	−0.8 (−1.1, −0.2) to 0.9 (0.2, 1.1)	13.2

Mean ± standard deviation [95% confidence interval].

LCC Lin’s concordance correlation, LoA limits of agreement, CoV coefficient of variation.