Table 4.
Intra- and interobserver reproducibility (N = 14 each) for the different deformation parameters divided by LVNC patients and healthy controls.
| Healthy | ||||||||
|---|---|---|---|---|---|---|---|---|
| Intraobserver | Interobserver | |||||||
| Mean difference ± 1.96 SD | CoV [%] | ICC (95% CI) | Mean difference ± 1.96 SD | CoV [%] | ICC (95% CI) | |||
| GLS [%] | −0.06 ± 2.86 | 6.6 | 0.97 (0.91–0.99) | −1.28 ± 4.32 | 9.6 | 0.9 (0.64–0.97) | ||
| GCS [%] | 2.32 ± 3.02 | 5.1 | 0.83 (−0.16–0.96) | 3.38 ± 4.19 | 7.2 | 0.68 (−0.24–0.92) | ||
| SRll [s−1] | −0.01 ± 0.19 | 8.2 | 0.99 (0.95–1.0) | 0.00 ± 0.266 | 11.3 | 0.98 (0.92–0.99) | ||
| SRcc [s−1] | −0.07 ± 0.16 | 4.7 | 0.98 (0.89–0.97) | −0.15 ± 0.38 | 11.5 | 0.9 (0.54–0.97) | ||
| Apical rotation [°] | −0.02 ± 0.60 | 8.4 | 0.99 (0.97–1.0) | −0.08 ± 0.82 | 11.5 | 0.98 (0.93–0.99) | ||
| Basal rotation [°] | 0.16 ± 0.54 | 12.8 | 0.99 (0.96–1.0) | 0.21 ± 0.80 | 19.3 | 0.98 (0.92–0.99) | ||
| Diseased | ||||||||
| Intraobserver | Interobserver | |||||||
| Mean difference ± 1.96 SD | CoV [%] | ICC (95% CI) | Mean difference ± 1.96 SD | CoV [%] | ICC (95% CI) | |||
| GLS [%] | −0.06 ± 2.68 | 7.2 | 0.96 (0.87–0.99) | −1.64 ± 5.35 | 13.9 | 0.77 (0.26–0.93) | ||
| GCS [%] | 1.75 ± 3.10 | 6.4 | 0.98 (0.85–1.0) | 3.1 ± 3.69 | 7.8 | 0.95 (0.09–0.99) | ||
| SRll [s−1] | −0.02 ± 0.11 | 6.4 | 0.99 (0.97–1.0) | −0.03 ± 0.24 | 14.2 | 0.95 (0.83–0.98) | ||
| SRcc [s−1] | −0.02 ± 0.13 | 5.3 | 0.99 (0.98–1.0) | −0.07 ± 0.13 | 5.4 | 0.99 (0.89–1.0) | ||
| Apical rotation [°] | −0.12 ± 0.98 | 20.2 | 0.95 (0.86–0.98) | −0.09 ± 1.04 | 21.3 | 0.95 (0.84–0.98) | ||
| Basal rotation [°] | −0.12 ± 0.42 | 13.1 | 0.99 (0.96–1.0) | −0.03 ± 0.37 | 11.8 | 0.99 (0.98–1.0) | ||
CoV, coefficient of variation; GCS, global circumferential strain; GLS, global longitudinal strain; ICC, intraclass correlation coefficient; LVNC, left ventricular non-compaction; SD, standard deviation; SRcc, peak circumferential strain rate, SRll, peak longitudinal strain rate.