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Table 3 Relationship between observed and estimated LAVI in the validation set

From: Validation of evaluating left ventricular diastolic function with estimated left atrial volume from anteroposterior diameter

  Equation 1 Equation 2
Intra-class correlationsa   
 Coefficient (95% CI) 0.63 (0.55–0.70) 0.63 (0.55–0.70)
 P value < 0.001 < 0.001
ROC analysesb   
 Area under curve (95% CI) 0.85 (0.80–0.90) 0.84 (0.79–0.89)
 P value < 0.001 < 0.001
Concordance testc   
 κ coefficient 0.50 0.49
 Overall proportion of agreement 78.98% 78.98%
Bland–Altman analyses   
 Mean difference − 0.02 − 0.02
 Limits of agreement − 14.73 to 14.68 − 14.80 to 14.76
  1. LAVI left atrial volume index, ROC receiver operating characteristic, CI confidence interval
  2. aIntra-class correlations between observed and estimated LAVI
  3. bIdentifying performance of estimated LAVI for observed LAVI > 34 mL/m2
  4. cConcordance between observed and estimated > 34 mL/m2