Figure 2. Adjusted Odds Ratios (ORs) of Adverse Pregnancy Outcomes According to Preconception Thyrotropin Levels.

All multivariable-adjusted ORs were estimated by logistic regression models and adjusted by maternal age at the last menstrual period, maternal education, area of residence, preconception body mass index, alcohol drinking, passive smoking, history of thyroid disease, hypertension, diabetes, and history of adverse pregnancy outcomes. NA indicates not available.