EF by radionuclide angiography (%) | EF by Teichholz’s formula (%) | EF by mitral ring motion × 5 (%) | EF by Simpson’s rule (%) | |
---|---|---|---|---|

Mean (SD) | 66.8 (6.8) | 73.5 (10.0) | 53.9 ( 12.9) | 67.3 (10.7) |

Difference from EF by radionuclide angiography | – | +6.7 ( 7.3) | −12.9 (13.9) | +0.5 (9.0) |

Level of significance of difference | – | p = 0.002 | p = 0.002 | NS |

Correlation to EF by radionuclide angiography | – |
r= 0.69 |
r = 0.11 |
r = 0.55 |

Level of significance of correlation | – | p = 0.003 | NS | p = 0.028 |

Limits of agreement (mean difference ±2 SD) | – | −8.7 and 22.3 | – | −17.6 and 18.6 |