Table 2.
Intra- and inter-observer agreement for selected categorical echocardiographic findings
| Variable | Kappa (95% CI) | Concordant | One Grade Difference | Two Grades Difference | N3 |
|---|---|---|---|---|---|
| Image Quality1 | |||||
| Intra-observer | 0.19 (0.04,0.34) | 48 (48%) | 49 (49%) | 3 (3%) | 100 |
| Inter-observer | 0.16 (0.01,0.31) | 44 (44%) | 54 (54%) | 2 (2%) | 100 |
| LV Dysfunction Grade2 | |||||
| Intra-observer | 0.58 (0.31,0.85) | 53 (90%) | 6 (10%) | 0 (0%) | 59 |
| Inter-observer | 0.42 (0.12,0.71) | 49 (83%) | 9 (15%) | 1 (2%) | 59 |
| RV Dysfunction Grade2 | |||||
| Intra-observer | 0.25 (0.01,0.50) | 34 (74%) | 10 (22%) | 2 (4%) | 46 |
| Inter-observer | 0.12 (−0.12,0.36) | 29 (62%) | 18 (38%) | 0 (0%) | 47 |
CI = confidence intervals
1
Graded as excellent, good, or fair
2
Graded as none, mild, moderate, or severe.
3
Number of pairs of observations in which both observers agreed that the structure was present and evaluable. In patients with mixed ventricular type, LV and RV measurements were included in their respective ventricular morphology group.
CI: confidence interval; LV: left ventricle; RV: right ventricle