Table 4.

Diagnostic performance and accuracy of variables between cases and controls

Variable *	Sensitivity(%)	Specificity(%)	Cut off	P-value	AUC
1-4
RBC-Magnesium	92%	82%	4.9	0.001	0.8
Creatinine	88%	82%	0.7	0.001	0.7
Magnesium	80%	40%	1.6	0.04	1.6
Albumin	90%	83%	3.5	0.001	0.9
Total protein	83%	56%	6.2	0.04	0.6
Albumin/ Total protein	81%	82%	0.5	0.01	0.6
2-4
RBC-Magnesium	92%	82%	4.9	0.001	0.8
Creatinine	88%	78%	0.7	0.03	0.8
Magnesium	80%	46%	1.6	0.05	0.6
Albumin	84%	88%	3.6	0.01	0.9
3-4
RBC-Magnesium	83%	76%	5	0.001	0.8
Creatinine	85%	79%	0.7	0.001	0.7
Magnesium	84%	85%	3.6	0.001	0.9
Albumin	85%	86%	0.57	0.001	0.9

AUC: area under the receiver-operating characteristic (ROC) curve; FBS: fasting blood sugar; RBC: red blood cell. 1: gestational diabetic pregnant women group, 2: diabetic pregnant woman group; 3: high-risk patient for diabetes; 4: control group. The P-values <0.05 indicate statistical significance. The ROC curve was used.