Table 4.
Left ventricular GCS intra- and inter-observer reproducibility
| Resolution | Intra-observer | Inter-observer | |||||
|---|---|---|---|---|---|---|---|
| Spatial (mm) | Temporal (frames/cycle) | Mean difference (SD of the Diff.) | ICC (95% CI) | CoV (%) | Mean difference (SD of the Diff.) | ICC (95% CI) | CoV (%) |
| 5 | 20 | 0.14 (3.69) | 0.96 (0.95–0.97) | 13.1 | 1.16 (6.55) | 0.85 (0.81–0.88) | 23.8 |
| 5 | 30 | 0.22 (4.02) | 0.95 (0.94–0.96) | 13.3 | 1.91 (6.27) | 0.86 (0.82–0.90) | 21.5 |
| 5 | 40 | 0.18 (4.31) | 0.95 (0.93–0.96) | 14.1 | 1.92 (6.85) | 0.84 (0.79–0.88) | 23.1 |
| 5 | 50 | 0.19 (4.39) | 0.94 (0.92–0.95) | 14.1 | 1.56 (6.90) | 0.81 (0.76–0.85) | 22.9 |
| 8 | 20 | 0.51 (4.29) | 0.94 (0.93–0.95) | 15.1 | 1.25 (5.90) | 0.87 (0.83–0.90) | 21.4 |
| 8 | 30 | 0.41 (4.08) | 0.94 (0.93–0.95) | 14.0 | 1.00 (5.68) | 0.87 (0.84–0.90) | 20.0 |
| 8 | 40 | 0.57 (4.66) | 0.94 (0.92–0.95) | 15.3 | 1.42 (6.49) | 0.85 (0.81–0.88) | 22.0 |
| 8 | 50 | 0.76 (4.10) | 0.94 (0.93–0.96) | 13.4 | 1.37 (6.16 = | 0.85 (0.81–0.88) | 20.8 |
| 10 | 20 | 0.36 (4.79) | 0.93 (0.91–0.94) | 17.1 | 0.74 (6.33) | 0.86 (0.83–0.89) | 23.1 |
| 10 | 30 | 0.23 (5.22) | 0.92 (0.91–0.94) | 17.6 | 1.71 (7.16) | 0.84 (0.79–0.87) | 25.0 |
| 10 | 40 | 0.61 (5.43) | 0.92 (0.90–0.94) | 17.8 | 1.19 (7,63) | 0.83 (0.79–0.86) | 25.7 |
| 10 | 50 | 0.58 (5.11) | 0.92 (0.90–0.94) | 16.7 | 0.83 (7.77) | 0.81 (0.76–0.85) | 26.0 |
SD standard deviation, Diff difference, ICC intraclass correlation coefficient, CoV coefficient of variation, LV left ventricular, GCS global circumferential strain (n = 336 data points)