Table 3.

AUC values for each IR sign and for an age-adjusted multivariate logistic regression model.

model	AUC	95%CI
Univariate
IR1	0.699	(0.639, 0.758)
IR2	0.613	(0.549, 0.678)
IR3	0.674	(0.611, 0.736)
IR4	0.557	(0.492, 0.623)
IR5	0.701	(0.640, 0.763)
Multivariate
(age-adjusted)	0.828	(0.783, 0.873)

Multivariate: age-adjusted multivariate regression model, which is shown as below:

ln(odds) = ln(OD) = α+β₀(Age)+β_1A(IR1_A)+ β_1B(IR1_B)+β₂(IR2)+β₃(IR3)+β₄(IR4)+β₅(IR5)

= -5.463+0.0872(Age)+0.3783(IR1_A)+1.9157(IR1_B)+0.1728(IR2)+0.1578(IR3)+1.0278(IR4)+1.0363(IR5).