Table 4. Sensitivity analysis of the cut-off value.

Cut-off Value (mg/g of creatinine) [mg/mmol]	Sn (%)	Sp (%)	ROC area [95% CI]
80 [8.0]	95.5	83.7	0.896 [0.876–0.916]
*84 [8.4]	94.4	86.1	0.903 [0.882–0.923]
90 [9.0]	90.3	88.9	0.896 [0.874–0.918]
150 [15.0]	58.7	98.6	0.786 [0.757–0.815]

Sn, sensitivity; Sp, specificity; CI, confidence interval; ROC, receiver operating characteristic.

*84 mg/g of creatinine (8.4 mg/mmol) for the TPCR was the optimal cut-off value to predict microalbuminuria based on the receiver operating characteristic curve analysis.