Table 4. Odds ratio analysis of CysC for the risk of GDM.

CysC level	Case (percentage of GDM)	OR (95% CI)	P	Age, BMI, HbA1c, HOMA-IR adjusted OR (95% CI)	P
Q 1	179(13.97)	1	-	1	-
Q 2	55(29.09)	2.53(1.23–5.19)	0.012 *	2.44(1.12–5.32)	0.025 *
Q 3	75(33.33)	3.08(1.63–5.84)	0.001 **	3.38(1.67–6.86)	0.001 **
Q 4	91(49.45)	6.03(3.34–10.87)	<0.001 **	5.516(2.82–10.79)	<0.001 **

*P<0.05

**P<0.01

Q1 (quartile1, CysC≤0.7), Q2 (quartile2, 0.7<CysC≤0.8), Q3 (quartile3, 0.8<CysC≤1.1) and Q4 (quartile4, CysC>1.1)

GDM: gestational diabetes mellitus; CysC: Cystatin C; CI: confidence interval; OR: odds ratio; BMI: body mass index; HbA1c: glycosylated hemoglobin; HOMA-IR: homeostasis model assessment of insulin resistance index