Table 4.

Odds of miscarriage by serum TSH levels in the first trimester in TPOAb-negative women only.

TSH (mIU/L)	Case (n = 373) (%)	Control (n = 1525) (%)	P value	OR (95% CI)
<0.4	12 (12.6)	83 (87.4)	0.207	0.67 (0.36–1.25)
0.4–<2.5	221 (17.8)	1024 (82.2)		1
2.5–<4.87	121 (24.1)	381 (75.9)	0.003	1.47 (1.15–1.89)
≥4.87	19 (35.2)	35 (64.8)	0.002	2.52 (1.41–4.48)