Table 1.
Reproducibility Measured on the Scan–Rescan Data Set for GL‐Shortening and MAPSE
| Median | Interquartile range | Difference between the 2 scans | R 2 | P value | CV | N | MDC90 | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Scan 1 | Scan 2 | Scan 1 | Scan 2 | ||||||||
| GL‐Shortening | AI | 14.6% | 14.7% | 11.8%–18.0% | 12.0%–17.3% | 0.23%±1.49% | 0.86 | 0.59 | 7.2% | 14 | 2.53% |
| Expert | 14.2% | 14.4% | 10.9%–18.3% | 11.6%–18.0% | 0.11%±2.26% | 0.76 | 0.83 | 11.1% | 29 | 3.85% | |
| MAPSE | AI | 12.4 mm | 11.8 mm | 9.5–13.9 mm | 9.9–13.5 mm | 0.20±1.08 mm | 0.87 | 0.54 | 6.5% | 9 | 1.84 mm |
| Expert | 12.5 mm | 12.1 mm | 10.1–14.4 mm | 10.6–14.0 mm | 0.20±1.57 mm | 0.76 | 0.57 | 9.1% | 16 | 2.70 mm | |
AI was treated as an independent operator and compared with the expert. The median and percentile values are given. Interscan and intrasubject differences between the 2 scans are reported as mean±SD, together with the R 2 ratio and within‐subject CV. The number of samples (N) required to detect 1 mm or 1% change in MAPSE and GL‐Shortening was computed. Minimal detectable changes are reported with 90% power of significance. AI indicates artificial intelligence; CV, coefficient of variation; GL‐Shortening, global longitudinal shortening; MAPSE, mitral annular plane systolic excursion; and MDC90, minimal detectable changes with 90% power of significance.