Table 5.
LV GCS SR 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 | 0.04 (0.22) | 0.96 (0.95–0.97) | 17.3 | 0.02 (0.37) | 0.86 (0.83–0.89) | 29.6 |
| 5 | 30 | 0.07 (0.31) | 0.94 (0.92–0.95) | 17.8 | 0.04 (0.42) | 0.88 (0.85–0.90) | 25.0 |
| 5 | 40 | 0.09 (0.38) | 0.92 (0.90–0.94) | 19.7 | 0.01 (0.52) | 0.84 (0.80–0.87) | 27.7 |
| 5 | 50 | 0.10 (0.45) | 0.89 (0.86–0.91) | 21.0 | 0.02 (0.57) | 0.81 (0.77–0.85) | 27.6 |
| 8 | 20 | 0.06 (0.25) | 0.94 (0.92–0.95) | 19.0 | 0.04 (0.31) | 0.89 (0.86–0.91) | 24.5 |
| 8 | 30 | 0.06 (0.30) | 0.92 (0.90–0.94) | 19.0 | 0.03 (0.33) | 0.89 (0.87–0.91) | 21.5 |
| 8 | 40 | 0.08 (0.35) | 0.93 (0.90–0.94) | 19.1 | 0.05 (0.46) | 0.84 (0.80–0.87) | 25.8 |
| 8 | 50 | 0.07 (0.31) | 0.94 (0.92–0.95) | 15.5 | 0.05 (0.44) | 0.85 (0.81–0.88) | 22.7 |
| 10 | 20 | 0.05 (0.24) | 0.95 (0.93–0.96) | 19.2 | 0.01 (0.32) | 0.90 (0.87–0.92) | 26.1 |
| 10 | 30 | 0.07 (0.34) | 0.93 (0.91–0.95) | 20.2 | 0.04 (0.46) | 0.87 (0.84–0.89) | 28.7 |
| 10 | 40 | 0.10 (0.40) | 0.92 (0.90–0.94) | 21.1 | 0.04 (0.55) | 0.84 (0.80–0.87) | 30.0 |
| 10 | 50 | 0.10 (0.38) | 0.92 (0.89–0.93) | 19.0 | 0.12 (0.70) | 0.84 (0.80–0.87) | 35.9 |
SD standard deviation, Diff difference, ICC intraclass correlation coefficient, CoV coefficient of variation, LV left ventricular, GLS global longitudinal strain, SRs systolic strain rate (n = 336 data points)