Table 2 Intra-observer reproducibility coefficients
From: The reproducibility of measuring maximum abdominal aortic aneurysm diameter from ultrasound images
Anatomical plane | Calliper placement | Reproducibility coefficient | Comparison between methods | |||||
|---|---|---|---|---|---|---|---|---|
Observer 1 (± mm) | Observer 2 (± mm) | Observer 3 (± mm) | Overall (± mm) | Mean difference squared | Standard error | P-value | ||
AP | ITI | 2.22 | 1.68 | 2.65 | 2.35 | 1.38 | 1.19 | Reference |
AP | LETLE | 2.17 | 1.89 | 2.37 | 2.16 | -0.17 | 1.43 | 0.906 |
AP | OTO | 2.31 | 2.53 | 2.50 | 2.60 | 0.31 | 1.43 | 0.830 |
Transverse | ITI | 4.76 | 4.91 | 4.83 | 4.90 | 4.63 | 1.44 | 0.001 |
Transverse | OTO | 5.62 | 4.74 | 5.51 | 5.62 | 6.49 | 1.44 | < 0.001 |