Fatty liver disease in severe obese patients: Diagnostic value of abdominal ultrasound

Table 3 Levels of sensibility, specificity, PPV and NPV for the ultrasound in the diagnosis of hepatic steatosis by waist circumference (WC) in severe obese patients

Variables	WC ≤116.9 kg/m2		WC≥117.0 kg/m2
	Value (%)	95% CI	Value (%)	95% CI
Sensibility	56.7	37.7-74.0	80	62.5-90.9
Specificity	85.7	42.0-99.2	100	19.8-100
PPV	94.4	70.6-99.7	100	85.0-100
NPV	31.6	13.6-56.5	22.2	3.9-59.8

PPV: Positive predictive value; NPV: Negative predictive value; 95% CI: Confidence interval of 95%.