Skip to main content

Table 2 Comparison of the intra-class correlation and mean difference for measurements obtained by edge-detection software and manual caliper measurement

From: Reproducibility of aortic intima-media thickness in infants using edge-detection software and manual caliper measurements

 

Measurement method

Edge detection

Manual caliper

Inter-operator reliability - same reader using cineloops from different ultrasound operators

n = 30

ICC 0.84 (95% CI 0.67, 0.92)

n = 30

ICC 0.87 (95% CI 0.73, 0.94)

mean diff 10 μm (95% LOA −39, 59)

mean diff 0.8 μm (95% LOA −50.2, 51.8)

Inter-reader reliability - two readers using same ultrasound images

n = 20

ICC 0.92 (95% CI 0.82, 0.97)

n = 290

ICC 0.84 (95% CI 0.80, 0.87)

mean diff 2 μm (95% LOA −45.0, 49.0)

mean diff 5 μm (95% LOA −51.8, 61.8)

Intra-reader reliability - same ultrasound images read twice by the same reader

n = 20

ICC 0.90 (95% CI 0.76, 0.96)

N/A (all read by both readers)

 

mean diff 1.5 μm (95% LOA −45.5, 48.5)

Â