TF and anxiety disorder: The odd ratios (OR) of anxiety disorders per 1 standard deviation (SD) unit increment in iron status biomarkers were 0.922 (95% confidence interval (CI) 0.862–0.986; p = 0.018) for serum iron level, 0.873 (95% CI 0.790–0.964; p = 0.008) for log-transformed ferritin and 0.917 (95% CI 0.867–0.969; p = 0.002) for transferrin saturation.