Skip to main content

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