Ultrasound hepatic/renal ratio and hepatic attenuation rate for quantifying liver fat content

Table 4 Comparison of fatty liver diagnosis by the ultrasound quantitative model, the ultrasound hepatic/renal ratio, the hepatic echo-intensity attenuation rate, and conventional ultrasound

Group	1H-MRS diagnosis of fatty liver
	Sensitivity (%)	Specificity (%)	Positive predictive value (%)	Negative predictive value (%)
All subjects
Quantitative ultrasound model	94.7	100.0	100.0	82.6
Conventional ultrasound	83.7	70.7	90.0	58.0
Ultrasound hepatic/renal ratio	88.3	84.5	94.2	72.4
Hepatic echo-intensity attenuation rate	86.7	78.7	92.0	67.0
Subjects with fatty content < 15% (1H-MRS)
Quantitative ultrasound model	81.4	100.0	100.0	84.5
Conventional ultrasound	47.6	70.3	73.1	62.7
Ultrasound hepatic/renal ratio	67.5	81.7	87.6	70.3
Hepatic echo-intensity attenuation rate	55.6	74.3	82.1	68.7

¹H-MRS: ¹H-magnetic resonance spectroscopy.