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Table 4 Intra- and inter-observer reliability

From: Direct measurement of atrioventricular valve regurgitant jets using 4D flow cardiovascular magnetic resonance is accurate and reliable for children with congenital heart disease: a retrospective cohort study

 Intra-observerInter-observer
Regurgitant Fraction (%)
(n = 20)
ICC (95% CI)Mean Difference (± SD)ICC (95% CI)Mean Difference (± SD)
VOL28.3% ± 20.60.97 (0.92–0.99)− 0.04% ± 5.430.96 (0.90–0.99)− 2.41% ± 5.05*
AIMstat23.3% ± 22.50.98 (0.95–0.99)0.15% ± 4.720.95 (0.88–0.98)1.89% ± 7.23
AIMtrack20.4% ± 23.40.98 (0.95–0.99)− 0.17% ± 4.860.96 (0.90–0.98)1.18% ± 7.12
JET28.6% ± 20.10.97 (0.93–0.99)− 0.09% ± 4.770.94 (0.87–0.98)1.92% ± 6.71
Planimetry
(LV = 8; RV = 12)
ICC (95% CI)Median Difference (IQR)ICC (95% CI)Median Difference (IQR)
LVEDVi (mL/m2)107.8 (84.5–128.7)0.99 (0.97–0.99)− 0.9 (− 4.3–0.4)0.99 (0.96–0.99)− 1.6 (− 4.3–2.1)
LVESVi (mL/m2)52.5 (40.3–59.3)0.99 (0.95–0.99)0.3 (− 5.1–1.7)0.99 (0.96–0.99)1.4 (0.3–3.6)
RVEDVi (mL/m2)135.6 (121.0–214.3)0.99 (0.99–1.00)− 1.8 (− 6.9–2.1)0.99 (0.99–1.00)− 0.5 (− 2.3–2.4)
RVESVi (mL/m2)74.4 (67.5–140.2)0.99 (0.98–0.99)− 2.6 (− 5.0–2.7)0.99 (0.99–0.99)1.4 (− 0.1–4.7)**
  1. Descriptive statistics for the 20 subjects from the original dataset are depicted in the second column to which the intra- and inter-observer differences can be compared. These differences were non-significant (p > 0.1), except for VOL and RVESVi inter-observer analysis as denoted by asterisks (*p = 0.046 and **p = 0.033, respectively). VOL Volumetry method, AIMstat Annular inflow method by static plane, AIMtrack Annular inflow method by valve-tracking plane, JET Direct measurement of the atrioventricular regurgitant jet, LV Left ventricle, RV Right ventricle, EDVi Indexed end-diastolic volume, ESVi Indexed end-systolic volume, ICC Intra-class correlation, CI Confidence interval, SD Standard deviation