Table 2. Diagnostic performance of E_ratio according to the interquartile range of elasticity value of the fat.

Fat elasticity value	IQR	AUC of Eratio (95% CI)	Comparison of AUC of Eratio	P value
E mean	< 25 th percentile	0.973 (0.954, 0.991)	< 25 th percentile vs 25 th percentile ~ median	0.415
	25 th percentile ~ median	0.982 (0.969, 0.996)	< 25 th percentile vs Median ~ 75 th percentile	0.694
	Median ~ 75 th percentile	0.966 (0.942, 0.991)	< 25 th percentile vs ≥ 75 th percentile	0.283
	≥ 75 th percentile	0.954 (0.926, 0.982)	25 th percentile ~ median vs Median ~ 75 th percentile	0.267
			25 th percentile ~ median vs ≥ 75 th percentile	0.077
			Median ~ 75 th percentile vs ≥ 75 th percentile	0.436
E max	< 25 th percentile	0.977 (0.961, 0.992)	< 25 th percentile vs 25 th percentile ~ median	0.462
	25 th percentile ~ median	0.967 (0.947, 0.987)	< 25 th percentile vs Median ~ 75 th percentile	0.449
	Median ~ 75 th percentile	0.966 (0.942, 0.989)	< 25 th percentile vs ≥ 75 th percentile	0.196
	≥ 75 th percentile	0.957 (0.930, 0.983)	25 th percentile ~ median vs Median ~ 75 th percentile	0.925
			25 th percentile ~ median vs ≥ 75 th percentile	0.531
			Median ~ 75 th percentile vs ≥ 75 th percentile	0.591

IQR = Interquartile range, AUC = the area under the receiver operating characteristic curve, CI = Confidence interval, E_mean = mean elasticity value of the reference fat, E_max = maximum elasticity value of the reference fat, E_ratio = elasticity ratio, the ratio between the mean elasticity values in the lesion and in the fatty tissue