Table 2 Inter- and intra-observer reproducibilities.

From: A novel index equivalent to the myocardial performance index for right ventricular functional assessment in children and adolescent patients

Parameter

Intra-observer variability

ICC (Intra-observer)

Inter-observer variability

ICC (Inter-observer)

PWD-MPI

−0.015 ± 0.041

0.921

−0.018 ± 0.041

0.882

TDI-MPI

0.013 ± 0.055

0.959

−0.014 ± 0.061

0.939

RVω (rad/s)

0.114 ± 0.632

0.998

0.125 ± 0.872

0.997

  1. Inter- and intra-observer variabilities (bias ± 1.96 SD [95% limit of agreement]) and the intraclass correlation coefficient (ICC) are shown.
  2. PWD-MPI, pulsed wave Doppler derived myocardial performance index; TDI-MPI, tissue Doppler imaging-derived myocardial performance index; RVω, the novel kinematic model index of the right ventricle, right ventricular pressure angular velocity.
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