Association between Urinary Iodine Concentration and Thyroid Nodules in Adults: A Cross-Sectional Study in China

Figure 2

The relationship between UIC and risk of thyroid nodules in adults stratified by sex. Similar U-shaped relationship between UIC and thyroid nodules was observed in men, but linear relationship was observed in women after adjusting for age, educational status, smoking status, type of salt used, family history of thyroid diseases, systolic pressure, body mass index, and waist circumference by smooth curve fitting.