Table 3.

Logistic regression models to distinguish (A) histology of small renal mass based on absolute enhancement between the noncontrast and corticomedullary phase and (B) renal cell carcinoma from benign histology using differences between tumor and medullary regions during the nephrogenic phase

Histology	OR (95% CI)*	P Value
(A) Based on Corticomedullary Phase
AML	Reference	⋯
Papillary	0.89 (0.82–0.96)	.004
Clear-cell	1.04 (1.01–1.08)	.026
Chromophobe	1.02 (0.97–1.06)	.456
Oncocytoma	1.04 (1.00–1.08)	.043
(B) Based on Nephrogenic Phase
Benign	Reference	⋯
RCC	1.016 (1.001–1.030)	.035

CI, confidence interval; OR, odds ratio.

^*Per 1 HU increase in difference.