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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
  1. ITI: Inner-to-inner; OTO: outer-to-outer; LETLE: leading edge-to-leading edge; AP: anterior–posterior
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