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Table 2 Intra- and inter-observer reproducibility data for T1 measurements

From: Myocardial iron overload by cardiovascular magnetic resonance native segmental T1 mapping: a sensitive approach that correlates with cardiac complications

 

Intra-observer

Inter-observer

CoV (%)

ICC (95% CI)

Bland–Altman analysis

CoV (%)

ICC (95% CI)

Bland–Altman analysis

Bias (ms)

Limits (ms)

Bias (ms)

Limits (ms)

Segment 1

1.45

0.997 (0.993–0.999)

− 2.7

− 35.6–39.2

4.83

0.996 (0.991–0.999)

4.6

− 33.1–42.2

Segment 2

2.24

0.992 (0.979–0.997)

1.7

− 51.5–54.8

2.09

0.992 (0.980–0.997)

9.9

− 36.1–55.8

Segment 3

1.17

0.998 (0.994–0.999)

3.3

− 23.7–30.4

2.42

0.991 (0.977–0.996)

5.6

− 50.9–62.2

Segment 4

1.62

0.996 (0.989–0.998)

0.1

− 39.1–39.3

1.82

0.994 (0.984–0.998)

9.8

− 29.7–49.3

Segment 5

1.45

0.995 (0.987–0.998)

− 4.1

− 37.9–29.7

3.10

0.977 (0.942–0.991)

8.4

− 64.3–81.1

Segment 6

1.81

0.994 (0.985–0.998)

0.6

− 41.3–42.5

2.79

0.986 (0.961–0.995)

13.6

− 45.5–72.6

Segment 7

2.42

0.992 (0.981–0.997)

7.6

− 49.3–64.5

3.83

0.979 (0.948–0.992)

12.7

− 77.8–103.1

Segment 8

1.38

0.997 (0.992–0.999)

− 6.9

− 36.8–23.0

1.79

0.995 (0.975–0.999)

13.8

− 19.2–46.9

Segment 9

1.32

0.998 (0.994–0.999)

− 6.3

− 34.5–21.9

3.29

0.986 (0.965–0.995)

14.5

− 57.4–86.4

Segment 10

1.59

0.997 (0.992–0.999)

− 5.0

− 41.4–31.4

2.49

0.992 (0.981–0.997)

5.9

− 52.2–63.9

Segment 11

1.77

0.9954 (0.986–0.998)

5.3

− 36.7–47.3

1.79

0.994 (0.985–0.998)

− 4.7

− 47.8–38.4

Segment 12

1.74

0.994 (0.986–0.998)

3.7

− 38.9–46.3

2.93

0.984 (0.960–0.994)

10.2

− 60.4–80.8

Segment 13

2.50

0.985 (0.962–0.994)

-8.2

− 75.2–58.9

2.13

0.989 (0.970–0.996)

11.7

− 42.2–65.9

Segment 14

1.52

0.996 (0.989–0.998)

2.8

− 36.3–41.9

2.55

0.987 (0.964–0.995)

14.9

− 44.7–74.5

Segment 15

1.90

0.994 (0.985–0.998)

3.0

− 45.5–51.4

3.19

0.983 (0.957–0.993)

− 1.5

− 83.4–80.4

Segment 16

2.61

0.985 (0.963–0.994)

− 0.1

− 74.0–73.9

2.22

0.988 (0.971–0.995)

− 5.7

− 67.3–56.0

Global

0.70

0.999 (0.998–1.000)

− 0.3

− 17.7–17.0

1.35

0.997 (0.989–0.999)

7.7

− 21.7–37.2

  1. CoV coefficient of variation, ICC intraclass correlation coefficient