Table 2.
Intra-observer and interobserver variability analysis
| LV-EDV | LV-ESV | LV-SV | LV-EF | LV-mass | RV-EDV | RV-ESV | RV-SV | RV-EF | RV-mass | |
|---|---|---|---|---|---|---|---|---|---|---|
| Intra-observer | ||||||||||
| Mean difference ± SD | 1.6 ± 3.9 | 1.9 ± 3.4 | –0.4 ± 3.4 | –0.9 ± 2.3 | 0.6 ± 4.1 | 0.9 ± 5.3 | 3.4 ± 3.4 | –2.5 ± 4.4 | –1.6 ± 1.9 | 0.1 ± 4.7 |
| Limits of agreement | −6.3 to 9.4 | −4.9 to 8.8 | −7.2 to 6.5 | −5.6 to 3.7 | −7.6 to 8.9 | −9.7 to 11.5 | −3.3 to 10.2 | −11.4 to 6.4 | −5.4 to 2.1 | −9.3 to 9.5 |
| Mean value ± SD | 134.9 ± 42.5 | 50.3 ± 19.2 | 84.7 ± 27.8 | 62.9 ± 6.4 | 125.2 ± 47.3 | 179.3 ± 84.8 | 86.9 ± 51.9 | 92.3 ± 37.2 | 53.8 ± 9.5 | 81.8 ± 44.6 |
| Coefficient of variability (%) | 2.9 | 6.8 | 4.1 | 3.7 | 3.3 | 3.0 | 3.9 | 4.8 | 3.5 | 5.7 |
| Inter-observer | ||||||||||
| Mean difference ± SD | 0.3 ± 5.8 | 1.6 ± 5.1 | –1.1 ± 4.4 | –0.9 ± 2.5 | –0.3 ± 7.5 | 4.0 ± 7.1 | 6.8 ± 6.4 | –2.6 ± 5.2 | –2.7 ± 3.0 | 2.4 ± 5.0 |
| Limits of agreement | −11.2 to 11.9 | −8.6 to 11.8 | −9.9 to 7.6 | −5.9 to 4.1 | −15.3 to 14.8 | −10.2 to 18.1 | −6.1 to 19.6 | −13.0 to 7.8 | −8.7 to 3.4 | −7.5 to 12.4 |
| Mean value ± SD | 135.0 ± 41.6 | 49.7 ± 18.9 | 85.4 ± 28.0 | 63.5 ± 6.9 | 125.3 ± 47.6 | 177.6 ± 83.7 | 83.8 ± 50.9 | 93.9 ± 37.4 | 55.2 ± 9.8 | 80.6 ± 45.6 |
| Coefficient of variability (%) | 4.3 | 10.2 | 5.1 | 3.9 | 6.0 | 4.0 | 7.7 | 5.5 | 5.5 | 6.2 |
Reported data are expressed as mean ± SD. Coefficient of variability: expressed as a percentage of the SD of the difference divided by the mean of the two measurements. Volumetric variables in milliliters, mass variables in grams
LV left ventricle, EDV end-diastolic volume, ESV end-systolic volume, SV stroke volume, EF ejection fraction, RV right ventricle