TG and goiter: The serum Tg levels were significantly higher (p<0.0001) in females [6.8(3.7~12.6) ng/mL vs. males 5.7(3.3~9.4) ng/mL], those with abnormal TSH [9.0(4.0~20.1 ng/mL) vs. normal TSH 6.4(3.6~10.9) ng/mL], negative TgAb [6.8(3.7~11.9) ng/mL vs. positive TgAb 3.1(1.4~6.3) ng/mL], and goiter [7.7(3.7~18.4) ng/mL vs. no goiter 6.4(3.6~10.9) ng/mL].