Intraoperator and interoperator reproducibility and time efficiency for E/e’
| Intraoperator reproducibility, n=50 | Interoperator reproducibility, n=18 | Time taken (s) to select and measure E/e’ (95% CI), n=18 | |||
| Bias (limits of agreement) | ICC (95% CI) | Bias (limits of agreement) | ICC (95% CI) | ||
| Single index-beat | −0.2 (−4.2 to 3.9) | 0.91 (0.84 to 0.95) | −0.3 (−2.9 to 2.2) | 0.94 (0.87 to 0.98) | 35.4 (33.1 to 37.8) |
| 3 consecutive beats | −0.7 (−6.2 to 4.8) | 0.74 (0.60 to 0.85) | −1.1 (−5.4 to 3.2) | 0.83 (0.64 to 0.93) | Not performed |
| 5 consecutive beats | −0.6 (−5.3 to 4.2) | 0.80 (0.68 to 0.88) | −1.1 (−6.5 to 4.2) | 0.78 (0.56 to 0.91) | 44.7 (41.8 to 47.5) |
| 10 consecutive beats | −0.4 (−4.2 to 3.4) | 0.88 (0.80 to 0.93) | −0.9 (−6.1 to 4.2) | 0.82 (0.62 to 0.93) | 98.1 (91.7 to 104.4) |
E/e’, mitral E wave max/average diastolic tissue Doppler velocity from the septal and lateral annulus; ICC, intraclass correlation coefficient.