Table 5.

Multivariate logistic regression analysis of factors influencing subclinical hypothyroidism during pregnancy in the nonobese female.

Factor	B	S.E	χ 2	P value	OR	95% CI
Age ≥30 years	1.451	0.481	9.100	0.003	4.267	1.662∼10.955
Education degree	0.676	0.486	1.935	0.164	1.966	0.758∼5.097
Drinking history	0.737	0.402	3.361	0.067	2.090	0.950∼4.595
Smoking history	0.741	0.452	2.688	0.101	2.098	0.865∼5.088
Folic acid supplementation during pregnancy	0.942	0.604	2.432	0.119	2.565	0.785∼8.380
History of pregnancy and childbirth	0.825	0.528	2.441	0.118	2.282	0.811∼6.423
Abortion history	0.894	0.557	2.576	0.108	2.445	0.821 ∼7.284
Increase of BPA	1.661	0.486	11.681	0.001	5.265	2.031∼13.648
Increase of RBP4	1.657	0.510	10.556	0.001	5.244	1.930∼14.248