Table 2.

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

Myocardial infarction (n = 20)	First measurement	Second measurement	Mean difference	P value	LCC (95% CI)	Bland–Altman (95% LoA)	CoV (%)
Native T1 (ms) infarct	1395 ± 72 [1246–1501]	1391 ± 74 [1241–1485]	−3.8	0.87	0.97 (0.91–0.99)	−20.0 (−27.4, −13.1) to 12.9 (5.8, 20.1)	4.1
30-min post manganese T1 (ms) infarct	1137 ± 79 [996–1280]	1133 ± 80 [1009–1284]	−4.2	0.87	0.97 (0.91–0.99)	− 18.4 (−24.8, −12.7) to 8.9 (2.86, 14.82)	6.9
Manganese uptake (Ki, mL/100 g of tissue/min) infarct	5.3 ± 1.4 [2.0–7.3]	5.4 ± 1.4 [3.0–7.4]	+ 0.06	0.95	0.98 (0.94–0.99)	− 0.4 (−0.8, −0.3) to 0.6 (0.3, 0.7)	8.1

Hypertrophic cardiomyopathy (n = 18)
Native T1 (ms) non fibrosis	1185 ± 35 [1104–1237]	1188 ± 33 [1112–1240]	+ 2.9	0.96	0.98 (0.93–0.99)	− 15.1 (−20.7, −9.5) to 9.2 (3.6, 14.7)	2.9
30-min post manganese T1 (ms) non fibrosis	922 ± 44 [838–994]	919 ± 40 [848–980]	−3.0	0.80	0.95 (0.81–0.98)	− 11.2 (−17.4, −4.8) to 15.1 (8.83, 21.4)	4.1
Manganese uptake (Ki, mL/100 g of tissue/min)	7.6 ± 1.6 [4.0–9.9]	7.7 ± 0.7 [7.4–9.4]	+ 0.07	0.96	0.97 (0.93–0.99)	− 0.6 (−0.8, −0.1) to 0.4 (0.2, 0.7)	7.4

Dilated cardiomyopathy (n = 10)
Native T1 (ms)	1208 ± 6 [1164–1252]	1206 ± 61 [1162–1250]	−2.7	0.92	0.99 (0.97–1.0)	−15.6 (−25.6, −6.1) to 11.4 (1.78, 20.9)	5.9
30-min post manganese T1 (ms)	981 ± 58 [923–1039]	985 ± 61 [924–1046]	+ 5.1	0.85	0.97 (0.83–0.97)	−22.5 (−25.5, −13.2) 18.4 (1.1, 24.5)	6.3
Manganese uptake (Ki, mL/100 g of tissue/min) non fibrosis	7.2 ± 1.5 [6.2–8.3]	7.4 ± 1.3 [6.4–8.3]	+ 0.2	0.81	0.95 (0.84–0.98)	− 0.9 (−1.5, −0.4) to 0.6 (0.04, 1.16)	12.5

Mean ± standard deviation [95% confidence interval].

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