Table 3.

Sensitivity, specificity, PPV, NPV, accuracy of SWE, URD, URPT, and eGFR to diagnose presence of IF.

	Sensitivity	Specificity	PPV	NPV	Accuracy
SWE	89% (95% CI, 86.3–100)	90% (95 % CI, 82.4–100)	91% (95% CI, 86.3–100)	92% (95% CI, 82.4–100)	93% (95% CI, 85.2–100)
URD	43% (95% CI, 81.2–100)	84.8% (95% CI, 82.3–100)	88.5% (95% CI, 85.6–100)	42% (95% CI, 84.1–100)	57% (95% CI, 81–100)
URPT	52% (95% CI, 81.2–100)	85.2% (95% CI, 82.3–100)	86.7% (95% CI, 85.6–100)	56% (95% CI, 84.1–100)	77% (95% CI, 86.1–100)
eGFR	82% (95% CI, 85.4–100)	92% (95% CI, 82.1–100)	92% (95% CI, 85.4–100)	83% (95% CI, 81.4–100)	94% (95% CI, 89.2–100)

PPV: positive predictive value; NPV: negative predictive value; CI: confidence interval; SWE: shear wave elastography; URD: ultrasonographic renal dimensions; URPT: ultrasonographic renal parenchymal thickness; eGFR: estimated glomerular filtration rate.