Table 4. Correlation between the maternal FT4 trends and GDM in pregnancy.

FT4 group	n (%)	OR (95% CI)	aOR (95% CI) b
Normal/normal	396 (9.26)	Ref	Ref
Low/low	22 (10.68)	1.15 (0.73–1.81)	0.86 (0.54–1.37)
Low/normal	79 (14.93)	1.61 (1.25–2.09) *	1.18 (0.90–1.56)
Normal/low	36 (7.39)	0.80 (0.56–1.14)	0.75 (0.52–1.07)

GDM: Gestational diabetes mellitus; FT4: Free T4; aOR: Adjusted odds ratio; CI: confidence interval;

^b. Adjusted age, BMI and TSH.

* P<0.05 compared with Normal/normal group.