Table 3.

Result of Sensitivity and Specificity analysis for Model 1 and Model 2

Model	Optimal cut off	ROC	95%CI	Sensitivity	Specificity
1	0.159	0.89	0.84, 0.94	82.0%	81.7%
2	0.173	0.87	0.83, 0.92	80.5%	80.3%

Model 1: All significant predictors from univariable analyses were analysed using multivariable (enter method).

Model 2: Two significant predictors from multivariable (enter method) were analysed again using multivariable (enter method).