Table 5.

Intra-observer and inter-observer concordance in the measurements obtained with the ultrasound-derived fat fraction algorithm

Position of the transducer		CCC (95% CI)	Pearson’s r	Mean difference, % (95% limits of agreement)
Intra-observer concordance
	Intercostal	0.91 (0.85 to 0.97)	0.91	0.188 (-5.138 to 5.513)
	Subcostal	0.81 (0.69 to 0.92)	0.82	0.056 (-5.907 to 6.018)
Inter-observer concordance
	Intercostal	0.70 (0.46 to 0.94)	0.71	-0.222 (-7.194 to 6.750)
	Subcostal	0.67 (0.40 to 0.95)	0.69	-0.375 (-11.011 to 10.261)
	Each measurement in a different location	0.38 (-0.01 to 0.77)	0.40	0.500 (-7.404 to 8.404)
	Free breathing, intercostal	0.57 (0.28 to 0.85)	0.64	-1.444 (-8.406 to 5.517)

CCC, concordance correlation coefficient; CI, confidence interval.