Table 2.
Interobsever variability.
| Percentage of deviation of measurements observer 1 to observer 2 | |||
|---|---|---|---|
| mean | sd | median | |
| Global circumferential strain | 15.2 | 12.0 | 14.5 |
| Global longitudinal strain 2 chamber view | 15.2 | 15.3 | 12.2 |
| Global longitudinal strain 3 chamber view | 11.9 | 9.5 | 9.7 |
| Global longitudinal strain 4 chamber view | 17.7 | 17.8 | 12.1 |
| Anteroseptal radial strain (RS1) | 41.3 | 45.5 | 32.6 |
| Anterior radial strain (RS2) | 46.3 | 54.9 | 27.4 |
| Lateral radial strain (RS3) | 39.6 | 41.3 | 31.4 |
| Posterior radial strain (RS4) | 44.9 | 82.0 | 26.4 |
| Inferior radial strain (RS5) | 83.6 | 259.7 | 21.8 |
| Septal radial strain (RS6) | 40.2 | 45.0 | 30.8 |
| Mean radial strain (average from RS1-RS6) | 35.9 | 46.3 | 25.7 |
| Spearman's rank correlation coefficients (rho) of observer 1 and observer 2 | |||
| n | rho | p-value | |
| Global circumferential strain | 21 | 0.263 | 0.249 |
| Global longitudinal strain 2 chamber view | 21 | 0.333 | 0.141 |
| Global longitudinal strain 3 chamber view | 21 | 0.513 | 0.017 |
| Global longitudinal strain 4 chamber view | 21 | 0.403 | 0.070 |
| Anteroseptal radial strain (RS1) | 20 | 0.525 | 0.018 |
| Anterior radial strain (RS2) | 20 | 0.456 | 0.044 |
| Lateral radial strain (RS3) | 20 | 0.390 | 0.085 |
| Posterior radial strain (RS4) | 20 | 0.298 | 0.201 |
| Inferior radial strain (RS5) | 20 | 0.565 | 0.009 |
| Septal radial strain (RS6) | 20 | 0.406 | 0.076 |
| Mean radial strain:(average from RS1-RS6) | 21 | 0.382 | 0.088 |
mean = average strain values, sd = standard deviation, n = number of participants, rho = correlation coefficient