Table 3.
Intraobserver and interobserver variabilities using Bland-Altman statistics, intraclass correlation coefficient (ICC) and Pearson’s correlation coefficient (R)
| Intra | Measure 1 | Measure 2 | Bland-Altman (95% CI) | ICC (95% CI) | R |
|
| |||||
| RVLS (%) | -17.3±4.6 | -16.6±5.1 | -0.75% (-5.13%-3.63%) | 0.891 (70.721-0.960), P < 0.001 | 0.9, P=0.04 |
|
| |||||
| Inter | Measure 1 | Measure 3 | Bland-Altman (95% CI) | ICC (95% CI) | R |
|
| |||||
| RVLS (%) | -17.3±4.6 | -17.1±4.1 | -0.31% (-7.13%-6.50%) | 0.827 (0.519-0.939), P=0.001 | 0.7, P=0.03 |
Two specialists reviewed the images of 10 randomly selected patients; both specialists performed RVLS measure; the first performed 2 measurements (Measure 1 and 2) for evaluating the intraobserver variability, the second specialist performed only one measure (Measure 3), that was compared with Measure 1 for the interobserver variability.